/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 17:52:54,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:52:54,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:52:54,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 17:52:54,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 17:52:54,154 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 17:52:54,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 17:52:54,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 17:52:54,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 17:52:54,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 17:52:54,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 17:52:54,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 17:52:54,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 17:52:54,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 17:52:54,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 17:52:54,163 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 17:52:54,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 17:52:54,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 17:52:54,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 17:52:54,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 17:52:54,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 17:52:54,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:52:54,193 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:52:54,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:52:54,194 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:52:54,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:52:54,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:52:54,195 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:52:54,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:52:54,195 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:52:54,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:52:54,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:52:54,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:52:54,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:52:54,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:52:54,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:52:54,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:52:54,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:52:54,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:52:54,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:52:54,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:52:54,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:52:54,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:52:54,198 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:52:54,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:52:54,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:52:54,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:52:54,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:52:54,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:52:54,546 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 17:52:54,547 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 17:52:54,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench-1.i [2021-06-05 17:52:54,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56f4dbee7/51b3226f64fc46d1b95b4fcd5da3268d/FLAG1379bcf05 [2021-06-05 17:52:55,120 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 17:52:55,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i [2021-06-05 17:52:55,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56f4dbee7/51b3226f64fc46d1b95b4fcd5da3268d/FLAG1379bcf05 [2021-06-05 17:52:55,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56f4dbee7/51b3226f64fc46d1b95b4fcd5da3268d [2021-06-05 17:52:55,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:52:55,583 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 17:52:55,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:55,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 17:52:55,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 17:52:55,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459b49ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55, skipping insertion in model container [2021-06-05 17:52:55,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 17:52:55,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 17:52:55,935 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-06-05 17:52:55,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:55,950 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 17:52:55,992 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench-1.i[30920,30933] [2021-06-05 17:52:55,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:56,066 INFO L208 MainTranslator]: Completed translation [2021-06-05 17:52:56,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56 WrapperNode [2021-06-05 17:52:56,067 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:56,068 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:56,068 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:52:56,068 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:52:56,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,102 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:56,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:52:56,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:52:56,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:52:56,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... [2021-06-05 17:52:56,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:52:56,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:52:56,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:52:56,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:52:56,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:52:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 17:52:56,228 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 17:52:56,228 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 17:52:56,229 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 17:52:56,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 17:52:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 17:52:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 17:52:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 17:52:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 17:52:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 17:52:56,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:52:56,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:52:56,232 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 17:52:56,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:52:56,550 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 17:52:56,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:56 BoogieIcfgContainer [2021-06-05 17:52:56,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:52:56,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:52:56,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:52:56,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:52:56,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 05:52:55" (1/3) ... [2021-06-05 17:52:56,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b67b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:52:56, skipping insertion in model container [2021-06-05 17:52:56,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:56" (2/3) ... [2021-06-05 17:52:56,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b67b94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:52:56, skipping insertion in model container [2021-06-05 17:52:56,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:56" (3/3) ... [2021-06-05 17:52:56,558 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench-1.i [2021-06-05 17:52:56,563 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:52:56,563 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:52:56,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:52:56,564 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:52:56,584 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,585 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,585 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,586 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,587 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,587 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,588 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,588 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,589 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,589 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,589 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,589 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,590 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,590 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,590 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,590 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,590 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,590 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,590 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,591 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,591 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,591 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,591 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,591 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,591 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,592 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,592 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,592 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,592 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,592 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,592 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,593 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,593 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,593 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,593 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,593 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,593 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,593 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,594 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,594 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,594 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,596 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,596 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,596 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,596 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,600 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,600 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,601 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,601 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:56,602 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 17:52:56,620 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 17:52:56,637 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:52:56,637 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:52:56,638 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:52:56,638 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:52:56,638 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:52:56,638 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:52:56,638 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:52:56,638 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 17:52:56,647 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-05 17:52:56,720 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 17:52:56,737 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:56,738 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:56,738 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:56,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:56,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-06-05 17:52:56,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:56,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034864562] [2021-06-05 17:52:56,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034864562] [2021-06-05 17:52:57,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034864562] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 17:52:57,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249390848] [2021-06-05 17:52:57,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:52:57,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:52:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:52:57,113 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,340 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-05 17:52:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:52:57,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 17:52:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,369 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 17:52:57,370 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 17:52:57,371 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:52:57,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 17:52:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-05 17:52:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-05 17:52:57,483 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-05 17:52:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,484 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-05 17:52:57,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-05 17:52:57,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:57,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,488 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:57,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:52:57,489 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:57,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:57,489 INFO L82 PathProgramCache]: Analyzing trace with hash 352608555, now seen corresponding path program 1 times [2021-06-05 17:52:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:57,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540702417] [2021-06-05 17:52:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:57,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540702417] [2021-06-05 17:52:57,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540702417] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:57,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525573185] [2021-06-05 17:52:57,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:57,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:57,598 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,691 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-06-05 17:52:57,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:57,691 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:57,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,700 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 17:52:57,701 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 17:52:57,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:57,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 17:52:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-06-05 17:52:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-06-05 17:52:57,746 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-06-05 17:52:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,746 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-06-05 17:52:57,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-06-05 17:52:57,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:57,749 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,749 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:57,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:52:57,750 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:57,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:57,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-06-05 17:52:57,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:57,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396319679] [2021-06-05 17:52:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396319679] [2021-06-05 17:52:57,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396319679] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:57,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333509427] [2021-06-05 17:52:57,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:57,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:57,908 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,996 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-06-05 17:52:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:57,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:57,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:58,004 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 17:52:58,005 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 17:52:58,005 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:58,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 17:52:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-06-05 17:52:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-06-05 17:52:58,043 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-06-05 17:52:58,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:58,043 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-06-05 17:52:58,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-06-05 17:52:58,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:58,047 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:58,047 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:58,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 17:52:58,047 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-06-05 17:52:58,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:58,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359269198] [2021-06-05 17:52:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:58,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359269198] [2021-06-05 17:52:58,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359269198] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:58,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:58,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:58,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556716468] [2021-06-05 17:52:58,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:58,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:58,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:58,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:58,162 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:58,262 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-06-05 17:52:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:52:58,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:58,271 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 17:52:58,271 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 17:52:58,272 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:52:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 17:52:58,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-06-05 17:52:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-05 17:52:58,314 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-05 17:52:58,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:58,315 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-05 17:52:58,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-05 17:52:58,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:58,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:58,318 INFO L554 BasicCegarLoop]: 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] [2021-06-05 17:52:58,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 17:52:58,318 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:58,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:58,319 INFO L82 PathProgramCache]: Analyzing trace with hash 476803984, now seen corresponding path program 1 times [2021-06-05 17:52:58,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:58,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800577200] [2021-06-05 17:52:58,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:58,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800577200] [2021-06-05 17:52:58,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800577200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:58,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307935303] [2021-06-05 17:52:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:52:58,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:52:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307935303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:58,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:52:58,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:52:58,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377964403] [2021-06-05 17:52:58,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:52:58,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:58,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:52:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:52:58,718 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:58,962 INFO L93 Difference]: Finished difference Result 2931 states and 7780 transitions. [2021-06-05 17:52:58,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:52:58,963 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:58,974 INFO L225 Difference]: With dead ends: 2931 [2021-06-05 17:52:58,975 INFO L226 Difference]: Without dead ends: 2549 [2021-06-05 17:52:58,975 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:52:58,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-05 17:52:59,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1814. [2021-06-05 17:52:59,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.724765581908439) internal successors, (4940), 1813 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4940 transitions. [2021-06-05 17:52:59,033 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4940 transitions. Word has length 42 [2021-06-05 17:52:59,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:59,034 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 4940 transitions. [2021-06-05 17:52:59,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4940 transitions. [2021-06-05 17:52:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:59,036 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:59,036 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:59,260 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,261 INFO L82 PathProgramCache]: Analyzing trace with hash -504897849, now seen corresponding path program 1 times [2021-06-05 17:52:59,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868181368] [2021-06-05 17:52:59,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:59,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868181368] [2021-06-05 17:52:59,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868181368] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:59,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:59,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:52:59,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002829505] [2021-06-05 17:52:59,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:52:59,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:59,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:52:59,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:52:59,416 INFO L87 Difference]: Start difference. First operand 1814 states and 4940 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:59,511 INFO L93 Difference]: Finished difference Result 2566 states and 6814 transitions. [2021-06-05 17:52:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:59,522 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 17:52:59,522 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 17:52:59,522 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 17:52:59,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1902. [2021-06-05 17:52:59,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7064702788006314) internal successors, (5145), 1901 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5145 transitions. [2021-06-05 17:52:59,573 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5145 transitions. Word has length 42 [2021-06-05 17:52:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:59,573 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5145 transitions. [2021-06-05 17:52:59,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5145 transitions. [2021-06-05 17:52:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:59,575 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:59,575 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 17:52:59,576 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -704490053, now seen corresponding path program 2 times [2021-06-05 17:52:59,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008455144] [2021-06-05 17:52:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:59,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008455144] [2021-06-05 17:52:59,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008455144] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:59,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:59,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:52:59,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415699014] [2021-06-05 17:52:59,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:52:59,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:59,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:52:59,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:52:59,651 INFO L87 Difference]: Start difference. First operand 1902 states and 5145 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:59,793 INFO L93 Difference]: Finished difference Result 2949 states and 7860 transitions. [2021-06-05 17:52:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:52:59,794 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:59,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:59,806 INFO L225 Difference]: With dead ends: 2949 [2021-06-05 17:52:59,806 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 17:52:59,806 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:52:59,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 17:52:59,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1866. [2021-06-05 17:52:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1866 states, 1865 states have (on average 2.72171581769437) internal successors, (5076), 1865 states have internal predecessors, (5076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 5076 transitions. [2021-06-05 17:52:59,870 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 5076 transitions. Word has length 42 [2021-06-05 17:52:59,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:59,871 INFO L482 AbstractCegarLoop]: Abstraction has 1866 states and 5076 transitions. [2021-06-05 17:52:59,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 5076 transitions. [2021-06-05 17:52:59,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:59,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:59,874 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 17:52:59,874 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1574389667, now seen corresponding path program 3 times [2021-06-05 17:52:59,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270961423] [2021-06-05 17:52:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:59,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270961423] [2021-06-05 17:52:59,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270961423] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:59,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:59,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:52:59,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478576434] [2021-06-05 17:52:59,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:52:59,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:59,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:52:59,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:52:59,969 INFO L87 Difference]: Start difference. First operand 1866 states and 5076 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:00,167 INFO L93 Difference]: Finished difference Result 3342 states and 8950 transitions. [2021-06-05 17:53:00,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:00,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:53:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:00,180 INFO L225 Difference]: With dead ends: 3342 [2021-06-05 17:53:00,180 INFO L226 Difference]: Without dead ends: 2896 [2021-06-05 17:53:00,181 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2021-06-05 17:53:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2103. [2021-06-05 17:53:00,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 2102 states have (on average 2.7121788772597526) internal successors, (5701), 2102 states have internal predecessors, (5701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 5701 transitions. [2021-06-05 17:53:00,230 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 5701 transitions. Word has length 42 [2021-06-05 17:53:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:00,230 INFO L482 AbstractCegarLoop]: Abstraction has 2103 states and 5701 transitions. [2021-06-05 17:53:00,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 5701 transitions. [2021-06-05 17:53:00,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:00,233 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:00,233 INFO L554 BasicCegarLoop]: 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] [2021-06-05 17:53:00,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 17:53:00,233 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:00,234 INFO L82 PathProgramCache]: Analyzing trace with hash -965377150, now seen corresponding path program 1 times [2021-06-05 17:53:00,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:00,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630067056] [2021-06-05 17:53:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630067056] [2021-06-05 17:53:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630067056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738413300] [2021-06-05 17:53:00,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:00,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738413300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:00,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:00,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573893177] [2021-06-05 17:53:00,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:00,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:00,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:00,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:00,638 INFO L87 Difference]: Start difference. First operand 2103 states and 5701 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:00,787 INFO L93 Difference]: Finished difference Result 3026 states and 7980 transitions. [2021-06-05 17:53:00,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:53:00,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:00,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:00,811 INFO L225 Difference]: With dead ends: 3026 [2021-06-05 17:53:00,811 INFO L226 Difference]: Without dead ends: 2874 [2021-06-05 17:53:00,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:53:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2874 states. [2021-06-05 17:53:00,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2874 to 2191. [2021-06-05 17:53:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 2.6968036529680366) internal successors, (5906), 2190 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 5906 transitions. [2021-06-05 17:53:00,868 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 5906 transitions. Word has length 47 [2021-06-05 17:53:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:00,868 INFO L482 AbstractCegarLoop]: Abstraction has 2191 states and 5906 transitions. [2021-06-05 17:53:00,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 5906 transitions. [2021-06-05 17:53:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:00,873 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:00,873 INFO L554 BasicCegarLoop]: 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] [2021-06-05 17:53:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 17:53:01,089 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1164969354, now seen corresponding path program 2 times [2021-06-05 17:53:01,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:01,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625850507] [2021-06-05 17:53:01,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:01,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:01,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625850507] [2021-06-05 17:53:01,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625850507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:01,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934797868] [2021-06-05 17:53:01,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:01,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:01,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:01,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:01,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934797868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:01,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:01,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:01,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776882498] [2021-06-05 17:53:01,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:01,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:01,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:01,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:01,619 INFO L87 Difference]: Start difference. First operand 2191 states and 5906 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:02,087 INFO L93 Difference]: Finished difference Result 4271 states and 11252 transitions. [2021-06-05 17:53:02,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:53:02,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:02,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:02,096 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 17:53:02,096 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 17:53:02,097 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:53:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 17:53:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2325. [2021-06-05 17:53:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2324 states have (on average 2.7104130808950084) internal successors, (6299), 2324 states have internal predecessors, (6299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 6299 transitions. [2021-06-05 17:53:02,156 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 6299 transitions. Word has length 47 [2021-06-05 17:53:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:02,157 INFO L482 AbstractCegarLoop]: Abstraction has 2325 states and 6299 transitions. [2021-06-05 17:53:02,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 6299 transitions. [2021-06-05 17:53:02,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:02,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:02,161 INFO L554 BasicCegarLoop]: 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] [2021-06-05 17:53:02,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 17:53:02,385 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:02,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:02,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1589922218, now seen corresponding path program 1 times [2021-06-05 17:53:02,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:02,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458440336] [2021-06-05 17:53:02,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:02,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458440336] [2021-06-05 17:53:02,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458440336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543483746] [2021-06-05 17:53:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:02,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543483746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:02,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:02,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353449032] [2021-06-05 17:53:02,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:02,740 INFO L87 Difference]: Start difference. First operand 2325 states and 6299 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:03,095 INFO L93 Difference]: Finished difference Result 5225 states and 13859 transitions. [2021-06-05 17:53:03,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 17:53:03,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:03,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:03,105 INFO L225 Difference]: With dead ends: 5225 [2021-06-05 17:53:03,105 INFO L226 Difference]: Without dead ends: 4488 [2021-06-05 17:53:03,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:53:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4488 states. [2021-06-05 17:53:03,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4488 to 2392. [2021-06-05 17:53:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2391 states have (on average 2.7314930991217063) internal successors, (6531), 2391 states have internal predecessors, (6531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 6531 transitions. [2021-06-05 17:53:03,168 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 6531 transitions. Word has length 47 [2021-06-05 17:53:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:03,168 INFO L482 AbstractCegarLoop]: Abstraction has 2392 states and 6531 transitions. [2021-06-05 17:53:03,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 6531 transitions. [2021-06-05 17:53:03,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:03,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:03,173 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:03,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 17:53:03,397 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:03,397 INFO L82 PathProgramCache]: Analyzing trace with hash 107753584, now seen corresponding path program 2 times [2021-06-05 17:53:03,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:03,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890013592] [2021-06-05 17:53:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:03,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:03,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:03,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890013592] [2021-06-05 17:53:03,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890013592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043697428] [2021-06-05 17:53:03,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:03,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:03,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:03,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:03,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:03,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043697428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:03,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979271952] [2021-06-05 17:53:03,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:03,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:03,791 INFO L87 Difference]: Start difference. First operand 2392 states and 6531 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:04,041 INFO L93 Difference]: Finished difference Result 4172 states and 11147 transitions. [2021-06-05 17:53:04,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:53:04,042 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:04,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:04,050 INFO L225 Difference]: With dead ends: 4172 [2021-06-05 17:53:04,050 INFO L226 Difference]: Without dead ends: 3790 [2021-06-05 17:53:04,050 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 276.2ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:53:04,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2021-06-05 17:53:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 2692. [2021-06-05 17:53:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2692 states, 2691 states have (on average 2.7435897435897436) internal successors, (7383), 2691 states have internal predecessors, (7383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2692 states to 2692 states and 7383 transitions. [2021-06-05 17:53:04,123 INFO L78 Accepts]: Start accepts. Automaton has 2692 states and 7383 transitions. Word has length 52 [2021-06-05 17:53:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:04,123 INFO L482 AbstractCegarLoop]: Abstraction has 2692 states and 7383 transitions. [2021-06-05 17:53:04,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 2692 states and 7383 transitions. [2021-06-05 17:53:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:04,128 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:04,128 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-06-05 17:53:04,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 17:53:04,342 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:04,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:04,342 INFO L82 PathProgramCache]: Analyzing trace with hash -873948249, now seen corresponding path program 3 times [2021-06-05 17:53:04,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:04,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709594689] [2021-06-05 17:53:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:04,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:04,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:04,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709594689] [2021-06-05 17:53:04,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709594689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730016182] [2021-06-05 17:53:04,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:04,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:53:04,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:04,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:04,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:04,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730016182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:04,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:04,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436530349] [2021-06-05 17:53:04,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:04,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:04,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:04,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:04,737 INFO L87 Difference]: Start difference. First operand 2692 states and 7383 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:04,915 INFO L93 Difference]: Finished difference Result 3829 states and 10132 transitions. [2021-06-05 17:53:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:04,916 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:04,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:04,922 INFO L225 Difference]: With dead ends: 3829 [2021-06-05 17:53:04,922 INFO L226 Difference]: Without dead ends: 3677 [2021-06-05 17:53:04,922 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:53:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3677 states. [2021-06-05 17:53:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3677 to 2779. [2021-06-05 17:53:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2779 states, 2778 states have (on average 2.7289416846652266) internal successors, (7581), 2778 states have internal predecessors, (7581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2779 states to 2779 states and 7581 transitions. [2021-06-05 17:53:04,981 INFO L78 Accepts]: Start accepts. Automaton has 2779 states and 7581 transitions. Word has length 52 [2021-06-05 17:53:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:04,981 INFO L482 AbstractCegarLoop]: Abstraction has 2779 states and 7581 transitions. [2021-06-05 17:53:04,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2779 states and 7581 transitions. [2021-06-05 17:53:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:04,985 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:04,985 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-06-05 17:53:05,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:05,200 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:05,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:05,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1073540453, now seen corresponding path program 4 times [2021-06-05 17:53:05,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:05,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924655530] [2021-06-05 17:53:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:05,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924655530] [2021-06-05 17:53:05,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924655530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689733625] [2021-06-05 17:53:05,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:05,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:05,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:05,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:05,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:05,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689733625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:05,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:05,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675364588] [2021-06-05 17:53:05,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:05,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:05,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:05,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:05,622 INFO L87 Difference]: Start difference. First operand 2779 states and 7581 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:06,034 INFO L93 Difference]: Finished difference Result 4833 states and 12979 transitions. [2021-06-05 17:53:06,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:53:06,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:06,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:06,044 INFO L225 Difference]: With dead ends: 4833 [2021-06-05 17:53:06,044 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 17:53:06,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:53:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 17:53:06,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 2806. [2021-06-05 17:53:06,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2806 states, 2805 states have (on average 2.736898395721925) internal successors, (7677), 2805 states have internal predecessors, (7677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2806 states to 2806 states and 7677 transitions. [2021-06-05 17:53:06,102 INFO L78 Accepts]: Start accepts. Automaton has 2806 states and 7677 transitions. Word has length 52 [2021-06-05 17:53:06,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:06,103 INFO L482 AbstractCegarLoop]: Abstraction has 2806 states and 7677 transitions. [2021-06-05 17:53:06,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2806 states and 7677 transitions. [2021-06-05 17:53:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:06,107 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:06,107 INFO L554 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:06,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 17:53:06,325 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1375261241, now seen corresponding path program 1 times [2021-06-05 17:53:06,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:06,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488110220] [2021-06-05 17:53:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:06,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:06,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:06,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488110220] [2021-06-05 17:53:06,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488110220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366730345] [2021-06-05 17:53:06,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:06,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:06,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:06,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366730345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:06,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:06,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619233675] [2021-06-05 17:53:06,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:06,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:06,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:06,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:06,669 INFO L87 Difference]: Start difference. First operand 2806 states and 7677 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:06,982 INFO L93 Difference]: Finished difference Result 4312 states and 11204 transitions. [2021-06-05 17:53:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:53:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:06,989 INFO L225 Difference]: With dead ends: 4312 [2021-06-05 17:53:06,990 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 17:53:06,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 335.1ms TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:53:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 17:53:07,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 2978. [2021-06-05 17:53:07,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.702384951293248) internal successors, (8045), 2977 states have internal predecessors, (8045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8045 transitions. [2021-06-05 17:53:07,049 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8045 transitions. Word has length 52 [2021-06-05 17:53:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:07,049 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8045 transitions. [2021-06-05 17:53:07,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8045 transitions. [2021-06-05 17:53:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:07,054 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:07,054 INFO L554 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:07,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:07,270 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:07,271 INFO L82 PathProgramCache]: Analyzing trace with hash -705460755, now seen corresponding path program 2 times [2021-06-05 17:53:07,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:07,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541735675] [2021-06-05 17:53:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:07,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:07,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541735675] [2021-06-05 17:53:07,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541735675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23005836] [2021-06-05 17:53:07,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:07,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:07,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:07,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:07,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:07,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23005836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:07,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:07,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337250487] [2021-06-05 17:53:07,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:07,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:07,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:07,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:07,587 INFO L87 Difference]: Start difference. First operand 2978 states and 8045 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:07,986 INFO L93 Difference]: Finished difference Result 4936 states and 12772 transitions. [2021-06-05 17:53:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:53:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:07,991 INFO L225 Difference]: With dead ends: 4936 [2021-06-05 17:53:07,991 INFO L226 Difference]: Without dead ends: 4632 [2021-06-05 17:53:07,991 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:53:07,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-06-05 17:53:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 3133. [2021-06-05 17:53:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3133 states, 3132 states have (on average 2.7426564495530013) internal successors, (8590), 3132 states have internal predecessors, (8590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3133 states to 3133 states and 8590 transitions. [2021-06-05 17:53:08,066 INFO L78 Accepts]: Start accepts. Automaton has 3133 states and 8590 transitions. Word has length 52 [2021-06-05 17:53:08,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:08,067 INFO L482 AbstractCegarLoop]: Abstraction has 3133 states and 8590 transitions. [2021-06-05 17:53:08,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3133 states and 8590 transitions. [2021-06-05 17:53:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:08,071 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:08,071 INFO L554 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:08,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:08,294 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:08,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:08,294 INFO L82 PathProgramCache]: Analyzing trace with hash 610535787, now seen corresponding path program 3 times [2021-06-05 17:53:08,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:08,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88326722] [2021-06-05 17:53:08,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:08,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:08,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:08,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88326722] [2021-06-05 17:53:08,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88326722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156675760] [2021-06-05 17:53:08,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-06-05 17:53:08,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:08,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:08,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156675760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:08,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544966702] [2021-06-05 17:53:08,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:08,645 INFO L87 Difference]: Start difference. First operand 3133 states and 8590 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:09,040 INFO L93 Difference]: Finished difference Result 5131 states and 13622 transitions. [2021-06-05 17:53:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:53:09,040 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:09,046 INFO L225 Difference]: With dead ends: 5131 [2021-06-05 17:53:09,046 INFO L226 Difference]: Without dead ends: 4827 [2021-06-05 17:53:09,047 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=260, Invalid=862, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:53:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2021-06-05 17:53:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 3149. [2021-06-05 17:53:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3149 states, 3148 states have (on average 2.7461880559085134) internal successors, (8645), 3148 states have internal predecessors, (8645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 8645 transitions. [2021-06-05 17:53:09,108 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 8645 transitions. Word has length 52 [2021-06-05 17:53:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:09,109 INFO L482 AbstractCegarLoop]: Abstraction has 3149 states and 8645 transitions. [2021-06-05 17:53:09,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 8645 transitions. [2021-06-05 17:53:09,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:09,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:09,115 INFO L554 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:09,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:09,333 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash 550068275, now seen corresponding path program 4 times [2021-06-05 17:53:09,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:09,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9814035] [2021-06-05 17:53:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:09,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:09,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:09,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9814035] [2021-06-05 17:53:09,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9814035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649471384] [2021-06-05 17:53:09,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:09,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:09,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:09,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:09,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:09,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649471384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:09,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:09,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042430572] [2021-06-05 17:53:09,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:09,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:09,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:09,672 INFO L87 Difference]: Start difference. First operand 3149 states and 8645 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:10,361 INFO L93 Difference]: Finished difference Result 6785 states and 18364 transitions. [2021-06-05 17:53:10,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 17:53:10,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:10,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:10,368 INFO L225 Difference]: With dead ends: 6785 [2021-06-05 17:53:10,368 INFO L226 Difference]: Without dead ends: 6109 [2021-06-05 17:53:10,369 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 601.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1749, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 17:53:10,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6109 states. [2021-06-05 17:53:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6109 to 3407. [2021-06-05 17:53:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 2.768349970640047) internal successors, (9429), 3406 states have internal predecessors, (9429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 9429 transitions. [2021-06-05 17:53:10,441 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 9429 transitions. Word has length 52 [2021-06-05 17:53:10,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:10,441 INFO L482 AbstractCegarLoop]: Abstraction has 3407 states and 9429 transitions. [2021-06-05 17:53:10,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,442 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 9429 transitions. [2021-06-05 17:53:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:10,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:10,448 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:10,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 17:53:10,665 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1774703266, now seen corresponding path program 5 times [2021-06-05 17:53:10,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:10,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300751135] [2021-06-05 17:53:10,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:10,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:10,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300751135] [2021-06-05 17:53:10,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300751135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:10,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754101698] [2021-06-05 17:53:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:10,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:53:10,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:10,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:10,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754101698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:11,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:11,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501194879] [2021-06-05 17:53:11,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:11,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:11,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:11,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:11,092 INFO L87 Difference]: Start difference. First operand 3407 states and 9429 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:11,263 INFO L93 Difference]: Finished difference Result 4692 states and 12647 transitions. [2021-06-05 17:53:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:11,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:11,268 INFO L225 Difference]: With dead ends: 4692 [2021-06-05 17:53:11,268 INFO L226 Difference]: Without dead ends: 4540 [2021-06-05 17:53:11,269 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 237.8ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:53:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-06-05 17:53:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3535. [2021-06-05 17:53:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7637238256932655) internal successors, (9767), 3534 states have internal predecessors, (9767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9767 transitions. [2021-06-05 17:53:11,331 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9767 transitions. Word has length 57 [2021-06-05 17:53:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:11,331 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 9767 transitions. [2021-06-05 17:53:11,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9767 transitions. [2021-06-05 17:53:11,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:11,336 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:11,336 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:11,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:11,557 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:11,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:11,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1575111062, now seen corresponding path program 6 times [2021-06-05 17:53:11,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:11,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182137343] [2021-06-05 17:53:11,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:11,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182137343] [2021-06-05 17:53:11,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182137343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553015786] [2021-06-05 17:53:11,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-06-05 17:53:11,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:53:11,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:11,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:11,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:12,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553015786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:12,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:12,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:12,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128027258] [2021-06-05 17:53:12,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:12,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:12,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:12,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:12,046 INFO L87 Difference]: Start difference. First operand 3535 states and 9767 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:12,595 INFO L93 Difference]: Finished difference Result 6576 states and 17655 transitions. [2021-06-05 17:53:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:53:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:12,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:12,600 INFO L225 Difference]: With dead ends: 6576 [2021-06-05 17:53:12,601 INFO L226 Difference]: Without dead ends: 6018 [2021-06-05 17:53:12,601 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=337, Invalid=1303, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 17:53:12,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6018 states. [2021-06-05 17:53:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6018 to 3424. [2021-06-05 17:53:12,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 2.7788489628980426) internal successors, (9512), 3423 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 9512 transitions. [2021-06-05 17:53:12,672 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 9512 transitions. Word has length 57 [2021-06-05 17:53:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:12,673 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 9512 transitions. [2021-06-05 17:53:12,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 9512 transitions. [2021-06-05 17:53:12,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:12,677 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:12,678 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:12,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 17:53:12,893 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash -271054540, now seen corresponding path program 5 times [2021-06-05 17:53:12,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:12,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734431836] [2021-06-05 17:53:12,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:13,004 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:13,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:13,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734431836] [2021-06-05 17:53:13,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734431836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534639927] [2021-06-05 17:53:13,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:13,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:53:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:13,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:13,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:13,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:13,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534639927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:13,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:13,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522139223] [2021-06-05 17:53:13,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:13,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:13,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:13,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:13,337 INFO L87 Difference]: Start difference. First operand 3424 states and 9512 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:13,770 INFO L93 Difference]: Finished difference Result 5340 states and 14012 transitions. [2021-06-05 17:53:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:53:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:13,776 INFO L225 Difference]: With dead ends: 5340 [2021-06-05 17:53:13,776 INFO L226 Difference]: Without dead ends: 4948 [2021-06-05 17:53:13,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:53:13,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2021-06-05 17:53:13,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 3552. [2021-06-05 17:53:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 2.758941143339904) internal successors, (9797), 3551 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 9797 transitions. [2021-06-05 17:53:13,830 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 9797 transitions. Word has length 57 [2021-06-05 17:53:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:13,830 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 9797 transitions. [2021-06-05 17:53:13,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,830 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 9797 transitions. [2021-06-05 17:53:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:13,835 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:13,835 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:14,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:14,049 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1943190760, now seen corresponding path program 6 times [2021-06-05 17:53:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:14,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819006403] [2021-06-05 17:53:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:14,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819006403] [2021-06-05 17:53:14,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819006403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585723961] [2021-06-05 17:53:14,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:14,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:53:14,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:14,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:14,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:14,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585723961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:14,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:14,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268941578] [2021-06-05 17:53:14,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:14,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:14,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:14,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:14,494 INFO L87 Difference]: Start difference. First operand 3552 states and 9797 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:14,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:14,989 INFO L93 Difference]: Finished difference Result 5417 states and 14247 transitions. [2021-06-05 17:53:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:53:14,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:14,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:14,994 INFO L225 Difference]: With dead ends: 5417 [2021-06-05 17:53:14,994 INFO L226 Difference]: Without dead ends: 5265 [2021-06-05 17:53:14,995 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 496.8ms TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:53:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-06-05 17:53:15,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 3672. [2021-06-05 17:53:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 2.7709071097793516) internal successors, (10172), 3671 states have internal predecessors, (10172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 10172 transitions. [2021-06-05 17:53:15,045 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 10172 transitions. Word has length 57 [2021-06-05 17:53:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:15,045 INFO L482 AbstractCegarLoop]: Abstraction has 3672 states and 10172 transitions. [2021-06-05 17:53:15,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 10172 transitions. [2021-06-05 17:53:15,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:15,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:15,050 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:15,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-06-05 17:53:15,274 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1035779994, now seen corresponding path program 7 times [2021-06-05 17:53:15,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:15,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121693840] [2021-06-05 17:53:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:15,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:15,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:15,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121693840] [2021-06-05 17:53:15,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121693840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:15,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161296283] [2021-06-05 17:53:15,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:15,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:15,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:15,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:15,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161296283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:15,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:15,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:15,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968271440] [2021-06-05 17:53:15,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:15,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:15,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:15,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:15,716 INFO L87 Difference]: Start difference. First operand 3672 states and 10172 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:16,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:16,362 INFO L93 Difference]: Finished difference Result 6477 states and 17215 transitions. [2021-06-05 17:53:16,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:53:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:16,371 INFO L225 Difference]: With dead ends: 6477 [2021-06-05 17:53:16,371 INFO L226 Difference]: Without dead ends: 6085 [2021-06-05 17:53:16,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 605.6ms TimeCoverageRelationStatistics Valid=377, Invalid=1429, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:53:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-06-05 17:53:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 3980. [2021-06-05 17:53:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3980 states, 3979 states have (on average 2.80120633324956) internal successors, (11146), 3979 states have internal predecessors, (11146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:16,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 11146 transitions. [2021-06-05 17:53:16,448 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 11146 transitions. Word has length 57 [2021-06-05 17:53:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:16,449 INFO L482 AbstractCegarLoop]: Abstraction has 3980 states and 11146 transitions. [2021-06-05 17:53:16,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 11146 transitions. [2021-06-05 17:53:16,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:16,455 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:16,455 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:16,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:16,669 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:16,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:16,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1096247506, now seen corresponding path program 8 times [2021-06-05 17:53:16,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:16,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782418784] [2021-06-05 17:53:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:16,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:16,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782418784] [2021-06-05 17:53:16,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782418784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:16,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100389446] [2021-06-05 17:53:16,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:16,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:26,401 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 1639 [2021-06-05 17:53:26,773 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 1646 DAG size of output: 1639 [2021-06-05 17:53:27,588 WARN L205 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 1653 [2021-06-05 17:53:27,989 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 1653 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown