/usr/bin/java -Xmx8000000000 -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_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 15:04:52,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 15:04:52,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 15:04:52,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-12 15:04:52,115 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-12 15:04:52,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-12 15:04:52,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-12 15:04:52,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-12 15:04:52,119 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-12 15:04:52,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-12 15:04:52,120 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-12 15:04:52,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-12 15:04:52,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 15:04:52,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 15:04:52,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 15:04:52,127 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 15:04:52,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 15:04:52,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 15:04:52,138 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 15:04:52,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 15:04:52,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 15:04:52,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 15:04:52,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 15:04:52,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 15:04:52,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 15:04:52,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-12 15:04:52,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-12 15:04:52,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-12 15:04:52,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-12 15:04:52,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-12 15:04:52,186 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-12 15:04:52,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-12 15:04:52,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-12 15:04:52,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-12 15:04:52,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-12 15:04:52,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-12 15:04:52,189 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 [2021-06-12 15:04:52,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 15:04:52,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 15:04:52,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 15:04:52,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 15:04:52,204 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 15:04:52,204 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 15:04:52,204 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 15:04:52,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 15:04:52,204 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 15:04:52,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 15:04:52,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 15:04:52,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 15:04:52,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 15:04:52,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 15:04:52,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 15:04:52,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 15:04:52,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 15:04:52,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 15:04:52,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 15:04:52,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 15:04:52,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 15:04:52,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 15:04:52,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 15:04:52,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 15:04:52,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 15:04:52,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 15:04:52,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 15:04:52,438 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-12 15:04:52,439 INFO L275 PluginConnector]: CDTParser initialized [2021-06-12 15:04:52,440 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-06-12 15:04:52,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f99d0fff5/4c298daae6254889b3491abbec58a34d/FLAG2bf32113c [2021-06-12 15:04:52,912 INFO L306 CDTParser]: Found 1 translation units. [2021-06-12 15:04:52,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2021-06-12 15:04:52,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f99d0fff5/4c298daae6254889b3491abbec58a34d/FLAG2bf32113c [2021-06-12 15:04:52,934 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f99d0fff5/4c298daae6254889b3491abbec58a34d [2021-06-12 15:04:52,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 15:04:52,937 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-12 15:04:52,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-12 15:04:52,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-12 15:04:52,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-12 15:04:52,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:04:52" (1/1) ... [2021-06-12 15:04:52,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@197b0013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:52, skipping insertion in model container [2021-06-12 15:04:52,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.06 03:04:52" (1/1) ... [2021-06-12 15:04:52,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-12 15:04:52,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-12 15:04:53,259 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_longest-1.i[30286,30299] [2021-06-12 15:04:53,271 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_longest-1.i[31038,31051] [2021-06-12 15:04:53,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:04:53,282 INFO L203 MainTranslator]: Completed pre-run [2021-06-12 15:04:53,314 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_longest-1.i[30286,30299] [2021-06-12 15:04:53,317 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_longest-1.i[31038,31051] [2021-06-12 15:04:53,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-12 15:04:53,362 INFO L208 MainTranslator]: Completed translation [2021-06-12 15:04:53,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53 WrapperNode [2021-06-12 15:04:53,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-12 15:04:53,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 15:04:53,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 15:04:53,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 15:04:53,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,393 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 15:04:53,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 15:04:53,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 15:04:53,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 15:04:53,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,424 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (1/1) ... [2021-06-12 15:04:53,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 15:04:53,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 15:04:53,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 15:04:53,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 15:04:53,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (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 [2021-06-12 15:04:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-12 15:04:53,479 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-12 15:04:53,479 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-12 15:04:53,480 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-12 15:04:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-12 15:04:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-12 15:04:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-12 15:04:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-12 15:04:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-12 15:04:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-12 15:04:53,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 15:04:53,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 15:04:53,481 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 15:04:53,726 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 15:04:53,727 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-12 15:04:53,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:04:53 BoogieIcfgContainer [2021-06-12 15:04:53,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 15:04:53,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 15:04:53,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 15:04:53,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 15:04:53,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.06 03:04:52" (1/3) ... [2021-06-12 15:04:53,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22484fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:04:53, skipping insertion in model container [2021-06-12 15:04:53,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.06 03:04:53" (2/3) ... [2021-06-12 15:04:53,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22484fa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 03:04:53, skipping insertion in model container [2021-06-12 15:04:53,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 03:04:53" (3/3) ... [2021-06-12 15:04:53,736 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2021-06-12 15:04:53,739 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 15:04:53,740 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 15:04:53,740 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 15:04:53,740 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 15:04:53,766 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,766 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,767 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,768 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,768 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,768 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,768 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,768 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,768 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,768 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,769 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,769 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,769 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,770 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,770 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,770 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,770 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,770 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,770 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,770 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,771 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,771 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,771 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,771 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,772 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,772 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,772 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,772 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,772 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,772 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,773 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,774 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,775 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,775 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,775 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,775 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,777 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,778 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,779 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,779 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,780 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,780 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,780 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,780 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,787 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,787 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,787 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,787 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,787 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,787 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-12 15:04:53,789 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-12 15:04:53,804 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 15:04:53,815 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 15:04:53,816 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 15:04:53,816 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 15:04:53,816 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 15:04:53,816 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 15:04:53,816 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 15:04:53,816 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 15:04:53,816 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 15:04:53,845 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-12 15:04:53,980 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) [2021-06-12 15:04:53,990 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) [2021-06-12 15:04:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 15:04:54,000 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:54,000 INFO L472 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] [2021-06-12 15:04:54,001 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:54,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:54,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1746009969, now seen corresponding path program 1 times [2021-06-12 15:04:54,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:54,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414054105] [2021-06-12 15:04:54,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:54,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:54,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:54,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414054105] [2021-06-12 15:04:54,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414054105] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:54,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:54,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-12 15:04:54,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341848901] [2021-06-12 15:04:54,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 15:04:54,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:54,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 15:04:54,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 15:04:54,306 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) [2021-06-12 15:04:54,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:54,437 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-12 15:04:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 15:04:54,438 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 [2021-06-12 15:04:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:54,451 INFO L225 Difference]: With dead ends: 3996 [2021-06-12 15:04:54,451 INFO L226 Difference]: Without dead ends: 1425 [2021-06-12 15:04:54,452 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:04:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-12 15:04:54,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-12 15:04:54,533 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) [2021-06-12 15:04:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-12 15:04:54,537 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-12 15:04:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:54,537 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-12 15:04:54,537 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) [2021-06-12 15:04:54,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-12 15:04:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 15:04:54,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:54,543 INFO L472 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] [2021-06-12 15:04:54,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 15:04:54,544 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:54,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1710770003, now seen corresponding path program 1 times [2021-06-12 15:04:54,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:54,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156612913] [2021-06-12 15:04:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:54,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:54,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156612913] [2021-06-12 15:04:54,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156612913] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:54,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:54,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:04:54,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757021640] [2021-06-12 15:04:54,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:04:54,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:04:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:04:54,683 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) [2021-06-12 15:04:54,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:54,780 INFO L93 Difference]: Finished difference Result 2001 states and 5364 transitions. [2021-06-12 15:04:54,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 15:04:54,780 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 [2021-06-12 15:04:54,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:54,787 INFO L225 Difference]: With dead ends: 2001 [2021-06-12 15:04:54,788 INFO L226 Difference]: Without dead ends: 1670 [2021-06-12 15:04:54,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-12 15:04:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-12 15:04:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1304. [2021-06-12 15:04:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1304 states, 1303 states have (on average 2.7206446661550268) internal successors, (3545), 1303 states have internal predecessors, (3545), 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) [2021-06-12 15:04:54,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 3545 transitions. [2021-06-12 15:04:54,823 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 3545 transitions. Word has length 37 [2021-06-12 15:04:54,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:54,824 INFO L482 AbstractCegarLoop]: Abstraction has 1304 states and 3545 transitions. [2021-06-12 15:04:54,825 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) [2021-06-12 15:04:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 3545 transitions. [2021-06-12 15:04:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-12 15:04:54,827 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:54,827 INFO L472 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] [2021-06-12 15:04:54,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 15:04:54,827 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1534224383, now seen corresponding path program 1 times [2021-06-12 15:04:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:54,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142531202] [2021-06-12 15:04:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:54,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:54,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142531202] [2021-06-12 15:04:54,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142531202] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:54,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:54,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-12 15:04:54,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562720054] [2021-06-12 15:04:54,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 15:04:54,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:54,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 15:04:54,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 15:04:54,904 INFO L87 Difference]: Start difference. First operand 1304 states and 3545 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) [2021-06-12 15:04:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:55,001 INFO L93 Difference]: Finished difference Result 2270 states and 6052 transitions. [2021-06-12 15:04:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 15:04:55,002 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 [2021-06-12 15:04:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:55,009 INFO L225 Difference]: With dead ends: 2270 [2021-06-12 15:04:55,009 INFO L226 Difference]: Without dead ends: 2003 [2021-06-12 15:04:55,009 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 15:04:55,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2021-06-12 15:04:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 1514. [2021-06-12 15:04:55,042 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) [2021-06-12 15:04:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-12 15:04:55,047 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-12 15:04:55,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:55,047 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-12 15:04:55,047 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) [2021-06-12 15:04:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-12 15:04:55,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:55,050 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:55,050 INFO L472 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] [2021-06-12 15:04:55,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 15:04:55,051 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:55,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:55,052 INFO L82 PathProgramCache]: Analyzing trace with hash -276543295, now seen corresponding path program 1 times [2021-06-12 15:04:55,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:55,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782141018] [2021-06-12 15:04:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:55,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:55,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782141018] [2021-06-12 15:04:55,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782141018] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:55,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:55,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:04:55,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981660603] [2021-06-12 15:04:55,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:04:55,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:55,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:04:55,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:04:55,121 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 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) [2021-06-12 15:04:55,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:55,214 INFO L93 Difference]: Finished difference Result 2443 states and 6548 transitions. [2021-06-12 15:04:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 15:04:55,214 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 [2021-06-12 15:04:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:55,222 INFO L225 Difference]: With dead ends: 2443 [2021-06-12 15:04:55,222 INFO L226 Difference]: Without dead ends: 2176 [2021-06-12 15:04:55,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:04:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-12 15:04:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1544. [2021-06-12 15:04:55,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.73298768632534) internal successors, (4217), 1543 states have internal predecessors, (4217), 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) [2021-06-12 15:04:55,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4217 transitions. [2021-06-12 15:04:55,258 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4217 transitions. Word has length 42 [2021-06-12 15:04:55,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:55,258 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4217 transitions. [2021-06-12 15:04:55,259 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) [2021-06-12 15:04:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4217 transitions. [2021-06-12 15:04:55,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:55,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:55,260 INFO L472 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] [2021-06-12 15:04:55,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 15:04:55,261 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1621234243, now seen corresponding path program 2 times [2021-06-12 15:04:55,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:55,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416396128] [2021-06-12 15:04:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:55,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:55,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416396128] [2021-06-12 15:04:55,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416396128] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:55,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:55,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:04:55,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107864747] [2021-06-12 15:04:55,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:04:55,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:55,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:04:55,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:04:55,343 INFO L87 Difference]: Start difference. First operand 1544 states and 4217 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) [2021-06-12 15:04:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:55,411 INFO L93 Difference]: Finished difference Result 2275 states and 6028 transitions. [2021-06-12 15:04:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 15:04:55,411 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 [2021-06-12 15:04:55,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:55,418 INFO L225 Difference]: With dead ends: 2275 [2021-06-12 15:04:55,418 INFO L226 Difference]: Without dead ends: 2123 [2021-06-12 15:04:55,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 48.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-12 15:04:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-06-12 15:04:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1569. [2021-06-12 15:04:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1569 states, 1568 states have (on average 2.7244897959183674) internal successors, (4272), 1568 states have internal predecessors, (4272), 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) [2021-06-12 15:04:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 4272 transitions. [2021-06-12 15:04:55,472 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 4272 transitions. Word has length 42 [2021-06-12 15:04:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:55,472 INFO L482 AbstractCegarLoop]: Abstraction has 1569 states and 4272 transitions. [2021-06-12 15:04:55,472 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) [2021-06-12 15:04:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 4272 transitions. [2021-06-12 15:04:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:55,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:55,474 INFO L472 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] [2021-06-12 15:04:55,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 15:04:55,474 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:55,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:55,474 INFO L82 PathProgramCache]: Analyzing trace with hash 858791553, now seen corresponding path program 3 times [2021-06-12 15:04:55,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:55,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369339369] [2021-06-12 15:04:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:55,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:55,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369339369] [2021-06-12 15:04:55,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369339369] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 15:04:55,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 15:04:55,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-12 15:04:55,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846874720] [2021-06-12 15:04:55,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 15:04:55,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:55,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 15:04:55,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-12 15:04:55,540 INFO L87 Difference]: Start difference. First operand 1569 states and 4272 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) [2021-06-12 15:04:55,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:55,648 INFO L93 Difference]: Finished difference Result 2904 states and 7740 transitions. [2021-06-12 15:04:55,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:04:55,649 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 [2021-06-12 15:04:55,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:55,656 INFO L225 Difference]: With dead ends: 2904 [2021-06-12 15:04:55,656 INFO L226 Difference]: Without dead ends: 2589 [2021-06-12 15:04:55,657 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:55,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2589 states. [2021-06-12 15:04:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2589 to 1746. [2021-06-12 15:04:55,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 2.7283667621776506) internal successors, (4761), 1745 states have internal predecessors, (4761), 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) [2021-06-12 15:04:55,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 4761 transitions. [2021-06-12 15:04:55,689 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 4761 transitions. Word has length 42 [2021-06-12 15:04:55,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:55,689 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 4761 transitions. [2021-06-12 15:04:55,689 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) [2021-06-12 15:04:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 4761 transitions. [2021-06-12 15:04:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-12 15:04:55,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:55,691 INFO L472 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] [2021-06-12 15:04:55,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-12 15:04:55,691 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:55,692 INFO L82 PathProgramCache]: Analyzing trace with hash -502364404, now seen corresponding path program 1 times [2021-06-12 15:04:55,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:55,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457702359] [2021-06-12 15:04:55,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:55,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:55,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457702359] [2021-06-12 15:04:55,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457702359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:55,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624062330] [2021-06-12 15:04:55,779 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 [2021-06-12 15:04:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 15:04:55,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:56,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624062330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:56,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:56,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-12 15:04:56,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952636233] [2021-06-12 15:04:56,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 15:04:56,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:56,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 15:04:56,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 15:04:56,123 INFO L87 Difference]: Start difference. First operand 1746 states and 4761 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) [2021-06-12 15:04:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:56,301 INFO L93 Difference]: Finished difference Result 3320 states and 8844 transitions. [2021-06-12 15:04:56,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:04:56,302 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 [2021-06-12 15:04:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:56,310 INFO L225 Difference]: With dead ends: 3320 [2021-06-12 15:04:56,310 INFO L226 Difference]: Without dead ends: 2786 [2021-06-12 15:04:56,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:04:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-12 15:04:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2113. [2021-06-12 15:04:56,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7130681818181817) internal successors, (5730), 2112 states have internal predecessors, (5730), 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) [2021-06-12 15:04:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5730 transitions. [2021-06-12 15:04:56,356 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5730 transitions. Word has length 42 [2021-06-12 15:04:56,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:56,357 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5730 transitions. [2021-06-12 15:04:56,357 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) [2021-06-12 15:04:56,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5730 transitions. [2021-06-12 15:04:56,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 15:04:56,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:56,359 INFO L472 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] [2021-06-12 15:04:56,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-12 15:04:56,578 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:56,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:56,578 INFO L82 PathProgramCache]: Analyzing trace with hash -232957222, now seen corresponding path program 1 times [2021-06-12 15:04:56,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:56,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185050938] [2021-06-12 15:04:56,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:56,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:56,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185050938] [2021-06-12 15:04:56,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185050938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:56,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815895825] [2021-06-12 15:04:56,658 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 [2021-06-12 15:04:56,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:04:56,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:56,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815895825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:56,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:56,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 15:04:56,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348776082] [2021-06-12 15:04:56,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:04:56,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:56,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:04:56,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:56,917 INFO L87 Difference]: Start difference. First operand 2113 states and 5730 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) [2021-06-12 15:04:57,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:57,179 INFO L93 Difference]: Finished difference Result 4087 states and 10892 transitions. [2021-06-12 15:04:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 15:04:57,179 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 [2021-06-12 15:04:57,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:57,191 INFO L225 Difference]: With dead ends: 4087 [2021-06-12 15:04:57,191 INFO L226 Difference]: Without dead ends: 3529 [2021-06-12 15:04:57,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2021-06-12 15:04:57,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2021-06-12 15:04:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 2150. [2021-06-12 15:04:57,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 2149 states have (on average 2.7240577012563985) internal successors, (5854), 2149 states have internal predecessors, (5854), 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) [2021-06-12 15:04:57,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 5854 transitions. [2021-06-12 15:04:57,259 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 5854 transitions. Word has length 47 [2021-06-12 15:04:57,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:57,260 INFO L482 AbstractCegarLoop]: Abstraction has 2150 states and 5854 transitions. [2021-06-12 15:04:57,260 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) [2021-06-12 15:04:57,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 5854 transitions. [2021-06-12 15:04:57,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 15:04:57,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:57,265 INFO L472 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] [2021-06-12 15:04:57,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-12 15:04:57,482 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:57,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:57,482 INFO L82 PathProgramCache]: Analyzing trace with hash -2095463568, now seen corresponding path program 2 times [2021-06-12 15:04:57,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:57,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923263291] [2021-06-12 15:04:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:57,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:57,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:57,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923263291] [2021-06-12 15:04:57,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923263291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:57,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544602660] [2021-06-12 15:04:57,546 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 [2021-06-12 15:04:57,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:04:57,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:04:57,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:04:57,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:57,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544602660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:57,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:57,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 15:04:57,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207560535] [2021-06-12 15:04:57,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:04:57,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:04:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:57,761 INFO L87 Difference]: Start difference. First operand 2150 states and 5854 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) [2021-06-12 15:04:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:57,939 INFO L93 Difference]: Finished difference Result 3549 states and 9211 transitions. [2021-06-12 15:04:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 15:04:57,939 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 [2021-06-12 15:04:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:57,950 INFO L225 Difference]: With dead ends: 3549 [2021-06-12 15:04:57,950 INFO L226 Difference]: Without dead ends: 3157 [2021-06-12 15:04:57,950 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:04:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2021-06-12 15:04:57,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 2260. [2021-06-12 15:04:57,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2260 states, 2259 states have (on average 2.691013722886233) internal successors, (6079), 2259 states have internal predecessors, (6079), 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) [2021-06-12 15:04:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 6079 transitions. [2021-06-12 15:04:57,993 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 6079 transitions. Word has length 47 [2021-06-12 15:04:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:57,993 INFO L482 AbstractCegarLoop]: Abstraction has 2260 states and 6079 transitions. [2021-06-12 15:04:57,994 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) [2021-06-12 15:04:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 6079 transitions. [2021-06-12 15:04:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 15:04:57,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:57,997 INFO L472 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] [2021-06-12 15:04:58,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-12 15:04:58,213 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -757470784, now seen corresponding path program 3 times [2021-06-12 15:04:58,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:58,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334853376] [2021-06-12 15:04:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:58,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:58,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334853376] [2021-06-12 15:04:58,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334853376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:58,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167193351] [2021-06-12 15:04:58,285 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 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 [2021-06-12 15:04:58,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-12 15:04:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:04:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:04:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:58,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167193351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:58,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:58,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 15:04:58,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081030611] [2021-06-12 15:04:58,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:04:58,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:58,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:04:58,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:58,530 INFO L87 Difference]: Start difference. First operand 2260 states and 6079 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) [2021-06-12 15:04:58,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:58,781 INFO L93 Difference]: Finished difference Result 4390 states and 11364 transitions. [2021-06-12 15:04:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 15:04:58,781 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 [2021-06-12 15:04:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:58,789 INFO L225 Difference]: With dead ends: 4390 [2021-06-12 15:04:58,789 INFO L226 Difference]: Without dead ends: 3998 [2021-06-12 15:04:58,789 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:04:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3998 states. [2021-06-12 15:04:58,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3998 to 2423. [2021-06-12 15:04:58,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2423 states, 2422 states have (on average 2.7345169281585466) internal successors, (6623), 2422 states have internal predecessors, (6623), 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) [2021-06-12 15:04:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-06-12 15:04:58,836 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-06-12 15:04:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:58,836 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-06-12 15:04:58,836 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) [2021-06-12 15:04:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-06-12 15:04:58,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 15:04:58,839 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:58,839 INFO L472 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] [2021-06-12 15:04:59,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:04:59,056 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:04:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:04:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1589464196, now seen corresponding path program 4 times [2021-06-12 15:04:59,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:04:59,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484932251] [2021-06-12 15:04:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:04:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:04:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:59,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:04:59,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484932251] [2021-06-12 15:04:59,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484932251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:59,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941496343] [2021-06-12 15:04:59,109 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 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 [2021-06-12 15:04:59,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:04:59,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:04:59,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 15:04:59,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:04:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:04:59,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941496343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:04:59,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:04:59,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-12 15:04:59,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885823179] [2021-06-12 15:04:59,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 15:04:59,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:04:59,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 15:04:59,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 15:04:59,331 INFO L87 Difference]: Start difference. First operand 2423 states and 6623 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) [2021-06-12 15:04:59,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:04:59,799 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-06-12 15:04:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 15:04:59,799 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 [2021-06-12 15:04:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:04:59,807 INFO L225 Difference]: With dead ends: 5771 [2021-06-12 15:04:59,807 INFO L226 Difference]: Without dead ends: 4898 [2021-06-12 15:04:59,808 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:04:59,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-12 15:04:59,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-06-12 15:04:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2816 states have (on average 2.7169744318181817) internal successors, (7651), 2816 states have internal predecessors, (7651), 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) [2021-06-12 15:04:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-06-12 15:04:59,859 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-06-12 15:04:59,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:04:59,859 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-06-12 15:04:59,859 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) [2021-06-12 15:04:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-06-12 15:04:59,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:04:59,863 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:04:59,863 INFO L472 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] [2021-06-12 15:05:00,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:00,077 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:00,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:00,077 INFO L82 PathProgramCache]: Analyzing trace with hash 436541687, now seen corresponding path program 5 times [2021-06-12 15:05:00,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:00,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490717834] [2021-06-12 15:05:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:00,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490717834] [2021-06-12 15:05:00,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490717834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:00,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056717550] [2021-06-12 15:05:00,139 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 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 [2021-06-12 15:05:00,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 15:05:00,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:00,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:00,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:00,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056717550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:00,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:00,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:00,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312481634] [2021-06-12 15:05:00,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:00,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:00,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:00,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:00,336 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 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) [2021-06-12 15:05:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:00,514 INFO L93 Difference]: Finished difference Result 4116 states and 10667 transitions. [2021-06-12 15:05:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 15:05:00,514 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 [2021-06-12 15:05:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:00,520 INFO L225 Difference]: With dead ends: 4116 [2021-06-12 15:05:00,520 INFO L226 Difference]: Without dead ends: 3964 [2021-06-12 15:05:00,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=160, Invalid=440, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:05:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3964 states. [2021-06-12 15:05:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3964 to 2842. [2021-06-12 15:05:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 2.7124252023935234) internal successors, (7706), 2841 states have internal predecessors, (7706), 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) [2021-06-12 15:05:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 7706 transitions. [2021-06-12 15:05:00,575 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 7706 transitions. Word has length 52 [2021-06-12 15:05:00,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:00,575 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 7706 transitions. [2021-06-12 15:05:00,575 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) [2021-06-12 15:05:00,575 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 7706 transitions. [2021-06-12 15:05:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:00,579 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:00,579 INFO L472 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] [2021-06-12 15:05:00,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:00,790 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1774534471, now seen corresponding path program 6 times [2021-06-12 15:05:00,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:00,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681073400] [2021-06-12 15:05:00,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:00,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:00,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681073400] [2021-06-12 15:05:00,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681073400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:00,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543786023] [2021-06-12 15:05:00,852 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 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 [2021-06-12 15:05:00,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 15:05:00,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:00,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:00,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:01,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543786023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:01,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:01,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:01,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120105005] [2021-06-12 15:05:01,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:01,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:01,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:01,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:01,040 INFO L87 Difference]: Start difference. First operand 2842 states and 7706 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) [2021-06-12 15:05:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:01,310 INFO L93 Difference]: Finished difference Result 4933 states and 12980 transitions. [2021-06-12 15:05:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:05:01,311 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 [2021-06-12 15:05:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:01,318 INFO L225 Difference]: With dead ends: 4933 [2021-06-12 15:05:01,318 INFO L226 Difference]: Without dead ends: 4629 [2021-06-12 15:05:01,319 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 231.6ms TimeCoverageRelationStatistics Valid=240, Invalid=752, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:05:01,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2021-06-12 15:05:01,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 3037. [2021-06-12 15:05:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3037 states, 3036 states have (on average 2.745718050065876) internal successors, (8336), 3036 states have internal predecessors, (8336), 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) [2021-06-12 15:05:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3037 states to 3037 states and 8336 transitions. [2021-06-12 15:05:01,370 INFO L78 Accepts]: Start accepts. Automaton has 3037 states and 8336 transitions. Word has length 52 [2021-06-12 15:05:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:01,370 INFO L482 AbstractCegarLoop]: Abstraction has 3037 states and 8336 transitions. [2021-06-12 15:05:01,370 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) [2021-06-12 15:05:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3037 states and 8336 transitions. [2021-06-12 15:05:01,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:01,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:01,374 INFO L472 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] [2021-06-12 15:05:01,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:01,593 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash -173497845, now seen corresponding path program 7 times [2021-06-12 15:05:01,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:01,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526603547] [2021-06-12 15:05:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:01,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526603547] [2021-06-12 15:05:01,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526603547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:01,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767467039] [2021-06-12 15:05:01,654 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 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 [2021-06-12 15:05:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:01,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:01,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:01,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767467039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:01,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:01,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:01,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772399861] [2021-06-12 15:05:01,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:01,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:01,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:01,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:01,867 INFO L87 Difference]: Start difference. First operand 3037 states and 8336 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) [2021-06-12 15:05:02,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:02,411 INFO L93 Difference]: Finished difference Result 6026 states and 16276 transitions. [2021-06-12 15:05:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 15:05:02,412 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 [2021-06-12 15:05:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:02,420 INFO L225 Difference]: With dead ends: 6026 [2021-06-12 15:05:02,420 INFO L226 Difference]: Without dead ends: 5350 [2021-06-12 15:05:02,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 15:05:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5350 states. [2021-06-12 15:05:02,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5350 to 3186. [2021-06-12 15:05:02,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 3185 states have (on average 2.778335949764521) internal successors, (8849), 3185 states have internal predecessors, (8849), 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) [2021-06-12 15:05:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 8849 transitions. [2021-06-12 15:05:02,474 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 8849 transitions. Word has length 52 [2021-06-12 15:05:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:02,474 INFO L482 AbstractCegarLoop]: Abstraction has 3186 states and 8849 transitions. [2021-06-12 15:05:02,474 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) [2021-06-12 15:05:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 8849 transitions. [2021-06-12 15:05:02,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:02,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:02,479 INFO L472 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] [2021-06-12 15:05:02,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 15:05:02,693 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:02,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:02,693 INFO L82 PathProgramCache]: Analyzing trace with hash 595336299, now seen corresponding path program 1 times [2021-06-12 15:05:02,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:02,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462339513] [2021-06-12 15:05:02,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:02,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:02,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462339513] [2021-06-12 15:05:02,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462339513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:02,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043141988] [2021-06-12 15:05:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:02,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043141988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:02,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158024667] [2021-06-12 15:05:02,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:02,953 INFO L87 Difference]: Start difference. First operand 3186 states and 8849 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) [2021-06-12 15:05:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:03,142 INFO L93 Difference]: Finished difference Result 4617 states and 12244 transitions. [2021-06-12 15:05:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 15:05:03,142 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 [2021-06-12 15:05:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:03,149 INFO L225 Difference]: With dead ends: 4617 [2021-06-12 15:05:03,149 INFO L226 Difference]: Without dead ends: 4465 [2021-06-12 15:05:03,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-06-12 15:05:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4465 states. [2021-06-12 15:05:03,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4465 to 3236. [2021-06-12 15:05:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 2.7693972179289026) internal successors, (8959), 3235 states have internal predecessors, (8959), 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) [2021-06-12 15:05:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 8959 transitions. [2021-06-12 15:05:03,202 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 8959 transitions. Word has length 52 [2021-06-12 15:05:03,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:03,203 INFO L482 AbstractCegarLoop]: Abstraction has 3236 states and 8959 transitions. [2021-06-12 15:05:03,203 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) [2021-06-12 15:05:03,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 8959 transitions. [2021-06-12 15:05:03,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:03,208 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:03,208 INFO L472 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] [2021-06-12 15:05:03,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 15:05:03,421 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:03,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:03,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1068664517, now seen corresponding path program 2 times [2021-06-12 15:05:03,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:03,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600856017] [2021-06-12 15:05:03,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:03,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:03,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600856017] [2021-06-12 15:05:03,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600856017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:03,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625805665] [2021-06-12 15:05:03,527 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 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 [2021-06-12 15:05:03,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:05:03,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:03,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:03,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625805665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:03,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:03,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:03,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705108375] [2021-06-12 15:05:03,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:03,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:03,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:03,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:03,733 INFO L87 Difference]: Start difference. First operand 3236 states and 8959 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) [2021-06-12 15:05:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:03,930 INFO L93 Difference]: Finished difference Result 4457 states and 11924 transitions. [2021-06-12 15:05:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 15:05:03,930 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 [2021-06-12 15:05:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:03,937 INFO L225 Difference]: With dead ends: 4457 [2021-06-12 15:05:03,937 INFO L226 Difference]: Without dead ends: 4305 [2021-06-12 15:05:03,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-06-12 15:05:03,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-12 15:05:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3235. [2021-06-12 15:05:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3234 states have (on average 2.7680890538033394) internal successors, (8952), 3234 states have internal predecessors, (8952), 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) [2021-06-12 15:05:03,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 8952 transitions. [2021-06-12 15:05:03,986 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 8952 transitions. Word has length 52 [2021-06-12 15:05:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:03,986 INFO L482 AbstractCegarLoop]: Abstraction has 3235 states and 8952 transitions. [2021-06-12 15:05:03,986 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) [2021-06-12 15:05:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 8952 transitions. [2021-06-12 15:05:03,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:03,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:03,989 INFO L472 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] [2021-06-12 15:05:04,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 15:05:04,205 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash 515469461, now seen corresponding path program 3 times [2021-06-12 15:05:04,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:04,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150183963] [2021-06-12 15:05:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:04,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:04,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150183963] [2021-06-12 15:05:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150183963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60063262] [2021-06-12 15:05:04,266 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 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 [2021-06-12 15:05:04,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 15:05:04,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:04,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:04,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:04,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60063262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:04,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:04,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:04,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610966745] [2021-06-12 15:05:04,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:04,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:04,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:04,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:04,460 INFO L87 Difference]: Start difference. First operand 3235 states and 8952 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) [2021-06-12 15:05:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:04,792 INFO L93 Difference]: Finished difference Result 5327 states and 14287 transitions. [2021-06-12 15:05:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 15:05:04,792 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 [2021-06-12 15:05:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:04,799 INFO L225 Difference]: With dead ends: 5327 [2021-06-12 15:05:04,799 INFO L226 Difference]: Without dead ends: 5175 [2021-06-12 15:05:04,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 294.3ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-06-12 15:05:04,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5175 states. [2021-06-12 15:05:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5175 to 3363. [2021-06-12 15:05:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 3362 states have (on average 2.796252230814991) internal successors, (9401), 3362 states have internal predecessors, (9401), 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) [2021-06-12 15:05:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 9401 transitions. [2021-06-12 15:05:04,849 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 9401 transitions. Word has length 52 [2021-06-12 15:05:04,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:04,849 INFO L482 AbstractCegarLoop]: Abstraction has 3363 states and 9401 transitions. [2021-06-12 15:05:04,849 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) [2021-06-12 15:05:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 9401 transitions. [2021-06-12 15:05:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-12 15:05:04,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:04,852 INFO L472 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] [2021-06-12 15:05:05,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-12 15:05:05,065 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:05,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1432562855, now seen corresponding path program 4 times [2021-06-12 15:05:05,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:05,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870354648] [2021-06-12 15:05:05,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:05,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:05,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:05,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870354648] [2021-06-12 15:05:05,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870354648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:05,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301773882] [2021-06-12 15:05:05,129 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 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 [2021-06-12 15:05:05,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 15:05:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:05,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 15:05:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:05,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:05,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301773882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:05,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:05,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-12 15:05:05,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346283298] [2021-06-12 15:05:05,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 15:05:05,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:05,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 15:05:05,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-12 15:05:05,351 INFO L87 Difference]: Start difference. First operand 3363 states and 9401 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) [2021-06-12 15:05:05,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:05,889 INFO L93 Difference]: Finished difference Result 6683 states and 18179 transitions. [2021-06-12 15:05:05,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 15:05:05,889 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 [2021-06-12 15:05:05,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:05,896 INFO L225 Difference]: With dead ends: 6683 [2021-06-12 15:05:05,896 INFO L226 Difference]: Without dead ends: 6253 [2021-06-12 15:05:05,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 458.9ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 15:05:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-06-12 15:05:05,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 3417. [2021-06-12 15:05:05,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 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) [2021-06-12 15:05:05,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-06-12 15:05:05,954 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 52 [2021-06-12 15:05:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:05,954 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-06-12 15:05:05,954 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) [2021-06-12 15:05:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-06-12 15:05:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:05,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:05,958 INFO L472 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] [2021-06-12 15:05:06,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 15:05:06,171 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:06,171 INFO L82 PathProgramCache]: Analyzing trace with hash -261717828, now seen corresponding path program 8 times [2021-06-12 15:05:06,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:06,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171928611] [2021-06-12 15:05:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:06,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:06,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171928611] [2021-06-12 15:05:06,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171928611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:06,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635109917] [2021-06-12 15:05:06,248 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 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 [2021-06-12 15:05:06,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 15:05:06,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 15:05:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:06,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635109917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:06,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 15:05:06,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-12 15:05:06,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675019283] [2021-06-12 15:05:06,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 15:05:06,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 15:05:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 15:05:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-06-12 15:05:06,519 INFO L87 Difference]: Start difference. First operand 3417 states and 9458 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) [2021-06-12 15:05:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 15:05:06,741 INFO L93 Difference]: Finished difference Result 4904 states and 12966 transitions. [2021-06-12 15:05:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 15:05:06,741 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 [2021-06-12 15:05:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 15:05:06,746 INFO L225 Difference]: With dead ends: 4904 [2021-06-12 15:05:06,746 INFO L226 Difference]: Without dead ends: 4752 [2021-06-12 15:05:06,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 233.5ms TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2021-06-12 15:05:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2021-06-12 15:05:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 3417. [2021-06-12 15:05:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 2.768735362997658) internal successors, (9458), 3416 states have internal predecessors, (9458), 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) [2021-06-12 15:05:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 9458 transitions. [2021-06-12 15:05:06,793 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 9458 transitions. Word has length 57 [2021-06-12 15:05:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 15:05:06,794 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 9458 transitions. [2021-06-12 15:05:06,794 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) [2021-06-12 15:05:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 9458 transitions. [2021-06-12 15:05:06,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-12 15:05:06,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 15:05:06,797 INFO L472 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] [2021-06-12 15:05:07,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:05:07,013 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-12 15:05:07,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 15:05:07,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1024160518, now seen corresponding path program 9 times [2021-06-12 15:05:07,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 15:05:07,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919888862] [2021-06-12 15:05:07,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 15:05:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 15:05:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 15:05:07,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 15:05:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919888862] [2021-06-12 15:05:07,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919888862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 15:05:07,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608513686] [2021-06-12 15:05:07,119 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 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 [2021-06-12 15:05:07,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 15:05:07,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 15:05:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 15:05:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-12 15:19:37,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 15:19:37,536 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 15:19:37,538 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 15:19:37,539 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 15:19:37,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 03:19:37 BasicIcfg [2021-06-12 15:19:37,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 15:19:37,539 INFO L168 Benchmark]: Toolchain (without parser) took 884602.86 ms. Allocated memory was 191.9 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 154.3 MB in the beginning and 689.4 MB in the end (delta: -535.1 MB). Peak memory consumption was 764.3 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:37,539 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 15:19:37,539 INFO L168 Benchmark]: CACSL2BoogieTranslator took 423.05 ms. Allocated memory is still 191.9 MB. Free memory was 154.1 MB in the beginning and 154.5 MB in the end (delta: -406.7 kB). Peak memory consumption was 10.2 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:37,539 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.35 ms. Allocated memory is still 191.9 MB. Free memory was 154.5 MB in the beginning and 152.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:37,539 INFO L168 Benchmark]: Boogie Preprocessor took 21.11 ms. Allocated memory is still 191.9 MB. Free memory was 152.7 MB in the beginning and 151.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:37,540 INFO L168 Benchmark]: RCFGBuilder took 301.45 ms. Allocated memory is still 191.9 MB. Free memory was 151.3 MB in the beginning and 129.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:37,540 INFO L168 Benchmark]: TraceAbstraction took 883808.22 ms. Allocated memory was 191.9 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 128.8 MB in the beginning and 689.4 MB in the end (delta: -560.7 MB). Peak memory consumption was 738.4 MB. Max. memory is 8.0 GB. [2021-06-12 15:19:37,540 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 191.9 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 423.05 ms. Allocated memory is still 191.9 MB. Free memory was 154.1 MB in the beginning and 154.5 MB in the end (delta: -406.7 kB). Peak memory consumption was 10.2 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 42.35 ms. Allocated memory is still 191.9 MB. Free memory was 154.5 MB in the beginning and 152.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.11 ms. Allocated memory is still 191.9 MB. Free memory was 152.7 MB in the beginning and 151.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 301.45 ms. Allocated memory is still 191.9 MB. Free memory was 151.3 MB in the beginning and 129.3 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 883808.22 ms. Allocated memory was 191.9 MB in the beginning and 1.2 GB in the end (delta: 1.0 GB). Free memory was 128.8 MB in the beginning and 689.4 MB in the end (delta: -560.7 MB). Peak memory consumption was 738.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 731]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 883722.4ms, OverallIterations: 20, TraceHistogramMax: 4, EmptinessCheckTime: 79.0ms, AutomataDifference: 4589.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 163.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1802 SDtfs, 8638 SDslu, 12532 SDs, 0 SdLazy, 2116 SolverSat, 507 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1085.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1034 GetRequests, 593 SyntacticMatches, 4 SemanticMatches, 437 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 3763.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3417occurred in iteration=18, InterpolantAutomatonStates: 392, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 935.8ms AutomataMinimizationTime, 19 MinimizatonAttempts, 22954 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 140.2ms SsaConstructionTime, 368.6ms SatisfiabilityAnalysisTime, 3378.3ms InterpolantComputationTime, 1534 NumberOfCodeBlocks, 1534 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 1502 ConstructedInterpolants, 0 QuantifiedInterpolants, 9987 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1673 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 32 InterpolantComputations, 6 PerfectInterpolantSequences, 0/148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown