/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 15:22:34,144 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 15:22:34,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 15:22:34,170 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 15:22:34,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 15:22:34,179 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 15:22:34,180 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 15:22:34,181 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 15:22:34,181 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 15:22:34,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 15:22:34,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 15:22:34,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 15:22:34,185 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 15:22:34,186 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 15:22:34,187 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 15:22:34,188 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 15:22:34,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 15:22:34,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 15:22:34,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 15:22:34,197 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 15:22:34,198 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 [2021-05-21 15:22:34,217 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 15:22:34,218 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 15:22:34,218 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 15:22:34,218 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 15:22:34,219 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 15:22:34,219 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 15:22:34,219 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 15:22:34,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 15:22:34,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 15:22:34,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 15:22:34,220 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 15:22:34,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 15:22:34,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 15:22:34,220 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 15:22:34,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 15:22:34,221 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 15:22:34,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 15:22:34,221 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 15:22:34,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 15:22:34,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 15:22:34,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 15:22:34,221 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 15:22:34,222 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 15:22:34,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:22:34,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 15:22:34,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 15:22:34,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 15:22:34,222 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 15:22:34,222 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 15:22:34,223 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 15:22:34,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 15:22:34,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 15:22:34,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 15:22:34,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 15:22:34,533 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 15:22:34,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 15:22:34,534 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 15:22:34,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-05-21 15:22:34,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6f00c698/d0ac50518a4b46959552920f1d2151c3/FLAG57e7aa8a8 [2021-05-21 15:22:35,097 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 15:22:35,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2021-05-21 15:22:35,110 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6f00c698/d0ac50518a4b46959552920f1d2151c3/FLAG57e7aa8a8 [2021-05-21 15:22:35,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6f00c698/d0ac50518a4b46959552920f1d2151c3 [2021-05-21 15:22:35,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 15:22:35,359 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 15:22:35,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 15:22:35,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 15:22:35,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 15:22:35,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b29736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35, skipping insertion in model container [2021-05-21 15:22:35,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 15:22:35,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 15:22:35,692 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_longer-1.i[30927,30940] [2021-05-21 15:22:35,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:22:35,701 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 15:22:35,747 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_longer-1.i[30927,30940] [2021-05-21 15:22:35,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:22:35,816 INFO L208 MainTranslator]: Completed translation [2021-05-21 15:22:35,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35 WrapperNode [2021-05-21 15:22:35,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 15:22:35,818 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 15:22:35,818 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 15:22:35,818 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 15:22:35,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,837 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 15:22:35,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 15:22:35,858 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 15:22:35,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 15:22:35,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (1/1) ... [2021-05-21 15:22:35,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 15:22:35,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 15:22:35,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 15:22:35,899 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 15:22:35,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (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 [2021-05-21 15:22:35,964 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 15:22:35,965 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 15:22:35,965 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 15:22:35,966 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 15:22:35,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 15:22:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 15:22:35,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 15:22:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 15:22:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 15:22:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 15:22:35,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 15:22:35,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 15:22:35,970 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 15:22:36,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 15:22:36,351 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 15:22:36,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:22:36 BoogieIcfgContainer [2021-05-21 15:22:36,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 15:22:36,355 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 15:22:36,355 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 15:22:36,358 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 15:22:36,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 03:22:35" (1/3) ... [2021-05-21 15:22:36,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495a208d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:22:36, skipping insertion in model container [2021-05-21 15:22:36,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:22:35" (2/3) ... [2021-05-21 15:22:36,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@495a208d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:22:36, skipping insertion in model container [2021-05-21 15:22:36,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:22:36" (3/3) ... [2021-05-21 15:22:36,361 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2021-05-21 15:22:36,368 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 15:22:36,369 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 15:22:36,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 15:22:36,370 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 15:22:36,398 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,401 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,401 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,402 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,402 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,403 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,403 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,410 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,413 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,414 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,414 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,414 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,414 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,414 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,420 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,420 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,421 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:22:36,422 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 15:22:36,440 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 15:22:36,465 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 15:22:36,465 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 15:22:36,465 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 15:22:36,465 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 15:22:36,465 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 15:22:36,466 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 15:22:36,466 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 15:22:36,466 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 15:22:36,477 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-05-21 15:22:36,587 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) [2021-05-21 15:22:36,595 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) [2021-05-21 15:22:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 15:22:36,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:36,612 INFO L521 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] [2021-05-21 15:22:36,612 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:36,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:36,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-05-21 15:22:36,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:36,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918058387] [2021-05-21 15:22:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918058387] [2021-05-21 15:22:37,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918058387] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:22:37,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300049165] [2021-05-21 15:22:37,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:22:37,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:22:37,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:22:37,029 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) [2021-05-21 15:22:37,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,219 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-05-21 15:22:37,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:22:37,220 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 [2021-05-21 15:22:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,239 INFO L225 Difference]: With dead ends: 3996 [2021-05-21 15:22:37,240 INFO L226 Difference]: Without dead ends: 1425 [2021-05-21 15:22:37,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:22:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-05-21 15:22:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-05-21 15:22:37,333 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) [2021-05-21 15:22:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-05-21 15:22:37,340 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-05-21 15:22:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,341 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-05-21 15:22:37,341 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) [2021-05-21 15:22:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-05-21 15:22:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:37,344 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,345 INFO L521 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] [2021-05-21 15:22:37,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 15:22:37,345 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,346 INFO L82 PathProgramCache]: Analyzing trace with hash -730808461, now seen corresponding path program 1 times [2021-05-21 15:22:37,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402337231] [2021-05-21 15:22:37,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402337231] [2021-05-21 15:22:37,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402337231] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:37,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916821479] [2021-05-21 15:22:37,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:37,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:37,490 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) [2021-05-21 15:22:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,605 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-05-21 15:22:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:22:37,606 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 [2021-05-21 15:22:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,616 INFO L225 Difference]: With dead ends: 2025 [2021-05-21 15:22:37,616 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 15:22:37,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:22:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 15:22:37,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-05-21 15:22:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-05-21 15:22:37,660 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-05-21 15:22:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,661 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-05-21 15:22:37,661 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) [2021-05-21 15:22:37,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-05-21 15:22:37,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:37,663 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,664 INFO L521 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] [2021-05-21 15:22:37,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 15:22:37,664 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-05-21 15:22:37,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139229828] [2021-05-21 15:22:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:37,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:37,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139229828] [2021-05-21 15:22:37,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139229828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:37,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:37,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:37,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114852042] [2021-05-21 15:22:37,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:37,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:37,791 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:37,901 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-05-21 15:22:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:22:37,901 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 [2021-05-21 15:22:37,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:37,909 INFO L225 Difference]: With dead ends: 2062 [2021-05-21 15:22:37,910 INFO L226 Difference]: Without dead ends: 1758 [2021-05-21 15:22:37,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:22:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-05-21 15:22:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-05-21 15:22:37,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-05-21 15:22:37,949 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-05-21 15:22:37,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:37,949 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-05-21 15:22:37,950 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) [2021-05-21 15:22:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-05-21 15:22:37,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 15:22:37,953 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:37,953 INFO L521 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] [2021-05-21 15:22:37,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 15:22:37,953 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:37,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-05-21 15:22:37,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:37,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956511462] [2021-05-21 15:22:37,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956511462] [2021-05-21 15:22:38,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956511462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:22:38,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684521013] [2021-05-21 15:22:38,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:22:38,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:22:38,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:22:38,081 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:38,176 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-05-21 15:22:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 15:22:38,177 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 [2021-05-21 15:22:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:38,188 INFO L225 Difference]: With dead ends: 2318 [2021-05-21 15:22:38,188 INFO L226 Difference]: Without dead ends: 1987 [2021-05-21 15:22:38,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:22:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-05-21 15:22:38,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-05-21 15:22:38,228 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) [2021-05-21 15:22:38,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-05-21 15:22:38,234 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-05-21 15:22:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,235 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-05-21 15:22:38,236 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) [2021-05-21 15:22:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-05-21 15:22:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:38,238 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,238 INFO L521 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] [2021-05-21 15:22:38,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 15:22:38,238 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1553921205, now seen corresponding path program 1 times [2021-05-21 15:22:38,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868784939] [2021-05-21 15:22:38,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868784939] [2021-05-21 15:22:38,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868784939] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:38,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25201857] [2021-05-21 15:22:38,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:38,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:38,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:38,348 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) [2021-05-21 15:22:38,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:38,418 INFO L93 Difference]: Finished difference Result 2203 states and 5812 transitions. [2021-05-21 15:22:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:22:38,418 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 [2021-05-21 15:22:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:38,427 INFO L225 Difference]: With dead ends: 2203 [2021-05-21 15:22:38,427 INFO L226 Difference]: Without dead ends: 2051 [2021-05-21 15:22:38,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:22:38,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-05-21 15:22:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1539. [2021-05-21 15:22:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 2.6937581274382314) internal successors, (4143), 1538 states have internal predecessors, (4143), 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) [2021-05-21 15:22:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 4143 transitions. [2021-05-21 15:22:38,472 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 4143 transitions. Word has length 42 [2021-05-21 15:22:38,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,472 INFO L482 AbstractCegarLoop]: Abstraction has 1539 states and 4143 transitions. [2021-05-21 15:22:38,472 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) [2021-05-21 15:22:38,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 4143 transitions. [2021-05-21 15:22:38,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:38,474 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,475 INFO L521 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] [2021-05-21 15:22:38,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 15:22:38,475 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,477 INFO L82 PathProgramCache]: Analyzing trace with hash 591722429, now seen corresponding path program 2 times [2021-05-21 15:22:38,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120723067] [2021-05-21 15:22:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120723067] [2021-05-21 15:22:38,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120723067] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:38,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230059987] [2021-05-21 15:22:38,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:38,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:38,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:38,553 INFO L87 Difference]: Start difference. First operand 1539 states and 4143 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) [2021-05-21 15:22:38,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:38,711 INFO L93 Difference]: Finished difference Result 2907 states and 7732 transitions. [2021-05-21 15:22:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:38,712 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 [2021-05-21 15:22:38,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:38,722 INFO L225 Difference]: With dead ends: 2907 [2021-05-21 15:22:38,722 INFO L226 Difference]: Without dead ends: 2461 [2021-05-21 15:22:38,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:38,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2461 states. [2021-05-21 15:22:38,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2461 to 1731. [2021-05-21 15:22:38,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1730 states have (on average 2.707514450867052) internal successors, (4684), 1730 states have internal predecessors, (4684), 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) [2021-05-21 15:22:38,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 4684 transitions. [2021-05-21 15:22:38,793 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 4684 transitions. Word has length 42 [2021-05-21 15:22:38,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:38,793 INFO L482 AbstractCegarLoop]: Abstraction has 1731 states and 4684 transitions. [2021-05-21 15:22:38,793 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) [2021-05-21 15:22:38,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 4684 transitions. [2021-05-21 15:22:38,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-21 15:22:38,797 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:38,797 INFO L521 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] [2021-05-21 15:22:38,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 15:22:38,797 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:38,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:38,798 INFO L82 PathProgramCache]: Analyzing trace with hash -535397893, now seen corresponding path program 3 times [2021-05-21 15:22:38,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:38,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785892463] [2021-05-21 15:22:38,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:38,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:38,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785892463] [2021-05-21 15:22:38,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785892463] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:22:38,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:22:38,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:22:38,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188188450] [2021-05-21 15:22:38,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:22:38,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:38,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:22:38,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:22:38,922 INFO L87 Difference]: Start difference. First operand 1731 states and 4684 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) [2021-05-21 15:22:39,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:39,075 INFO L93 Difference]: Finished difference Result 3149 states and 8380 transitions. [2021-05-21 15:22:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:22:39,076 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 [2021-05-21 15:22:39,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:39,087 INFO L225 Difference]: With dead ends: 3149 [2021-05-21 15:22:39,087 INFO L226 Difference]: Without dead ends: 2834 [2021-05-21 15:22:39,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2834 states. [2021-05-21 15:22:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2834 to 1941. [2021-05-21 15:22:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 2.6943298969072167) internal successors, (5227), 1940 states have internal predecessors, (5227), 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) [2021-05-21 15:22:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 5227 transitions. [2021-05-21 15:22:39,147 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 5227 transitions. Word has length 42 [2021-05-21 15:22:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:39,147 INFO L482 AbstractCegarLoop]: Abstraction has 1941 states and 5227 transitions. [2021-05-21 15:22:39,147 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) [2021-05-21 15:22:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 5227 transitions. [2021-05-21 15:22:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:39,150 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:39,150 INFO L521 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] [2021-05-21 15:22:39,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 15:22:39,151 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:39,151 INFO L82 PathProgramCache]: Analyzing trace with hash 847069600, now seen corresponding path program 1 times [2021-05-21 15:22:39,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:39,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849344347] [2021-05-21 15:22:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:39,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:39,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849344347] [2021-05-21 15:22:39,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849344347] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:39,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815314445] [2021-05-21 15:22:39,236 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 [2021-05-21 15:22:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:39,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:39,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:39,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815314445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:39,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:39,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:39,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006451235] [2021-05-21 15:22:39,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:39,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:39,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:39,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:39,574 INFO L87 Difference]: Start difference. First operand 1941 states and 5227 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) [2021-05-21 15:22:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:39,768 INFO L93 Difference]: Finished difference Result 3261 states and 8492 transitions. [2021-05-21 15:22:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:22:39,768 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 [2021-05-21 15:22:39,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:39,794 INFO L225 Difference]: With dead ends: 3261 [2021-05-21 15:22:39,794 INFO L226 Difference]: Without dead ends: 2781 [2021-05-21 15:22:39,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:22:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-05-21 15:22:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 2030. [2021-05-21 15:22:39,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 2.6638738294726467) internal successors, (5405), 2029 states have internal predecessors, (5405), 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) [2021-05-21 15:22:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 5405 transitions. [2021-05-21 15:22:39,863 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 5405 transitions. Word has length 47 [2021-05-21 15:22:39,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:39,864 INFO L482 AbstractCegarLoop]: Abstraction has 2030 states and 5405 transitions. [2021-05-21 15:22:39,865 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) [2021-05-21 15:22:39,865 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 5405 transitions. [2021-05-21 15:22:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:39,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:39,892 INFO L521 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] [2021-05-21 15:22:40,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 15:22:40,093 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:40,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1597229004, now seen corresponding path program 2 times [2021-05-21 15:22:40,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:40,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480285950] [2021-05-21 15:22:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:40,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:40,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480285950] [2021-05-21 15:22:40,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480285950] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:40,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889626416] [2021-05-21 15:22:40,210 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 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 [2021-05-21 15:22:40,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:40,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:40,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:40,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889626416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:40,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:40,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:40,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070100881] [2021-05-21 15:22:40,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:40,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:40,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:40,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:40,502 INFO L87 Difference]: Start difference. First operand 2030 states and 5405 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) [2021-05-21 15:22:40,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:40,698 INFO L93 Difference]: Finished difference Result 3013 states and 7804 transitions. [2021-05-21 15:22:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:22:40,698 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 [2021-05-21 15:22:40,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:40,705 INFO L225 Difference]: With dead ends: 3013 [2021-05-21 15:22:40,705 INFO L226 Difference]: Without dead ends: 2861 [2021-05-21 15:22:40,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 189.8ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:22:40,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-21 15:22:40,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2064. [2021-05-21 15:22:40,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.6539020843431897) internal successors, (5475), 2063 states have internal predecessors, (5475), 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) [2021-05-21 15:22:40,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5475 transitions. [2021-05-21 15:22:40,758 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5475 transitions. Word has length 47 [2021-05-21 15:22:40,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:40,759 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5475 transitions. [2021-05-21 15:22:40,759 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) [2021-05-21 15:22:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5475 transitions. [2021-05-21 15:22:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:40,762 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:40,762 INFO L521 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] [2021-05-21 15:22:40,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:40,977 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1224443028, now seen corresponding path program 3 times [2021-05-21 15:22:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:40,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455625482] [2021-05-21 15:22:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455625482] [2021-05-21 15:22:41,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455625482] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145576556] [2021-05-21 15:22:41,060 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 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 [2021-05-21 15:22:41,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 15:22:41,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:41,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:41,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145576556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:41,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:41,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416841341] [2021-05-21 15:22:41,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:41,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:41,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:41,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:41,313 INFO L87 Difference]: Start difference. First operand 2064 states and 5475 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) [2021-05-21 15:22:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:41,523 INFO L93 Difference]: Finished difference Result 3525 states and 9020 transitions. [2021-05-21 15:22:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:22:41,524 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 [2021-05-21 15:22:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:41,530 INFO L225 Difference]: With dead ends: 3525 [2021-05-21 15:22:41,531 INFO L226 Difference]: Without dead ends: 3045 [2021-05-21 15:22:41,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 210.4ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:41,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3045 states. [2021-05-21 15:22:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3045 to 2094. [2021-05-21 15:22:41,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2094 states, 2093 states have (on average 2.661729574773053) internal successors, (5571), 2093 states have internal predecessors, (5571), 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) [2021-05-21 15:22:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 5571 transitions. [2021-05-21 15:22:41,618 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 5571 transitions. Word has length 47 [2021-05-21 15:22:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:41,618 INFO L482 AbstractCegarLoop]: Abstraction has 2094 states and 5571 transitions. [2021-05-21 15:22:41,618 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) [2021-05-21 15:22:41,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 5571 transitions. [2021-05-21 15:22:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:41,622 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:41,622 INFO L521 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] [2021-05-21 15:22:41,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 15:22:41,837 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash 511209706, now seen corresponding path program 4 times [2021-05-21 15:22:41,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:41,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505772276] [2021-05-21 15:22:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:41,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:41,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505772276] [2021-05-21 15:22:41,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505772276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:41,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511882127] [2021-05-21 15:22:41,938 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 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 [2021-05-21 15:22:42,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:42,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:42,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:42,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:42,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511882127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:42,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:42,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:42,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77486990] [2021-05-21 15:22:42,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:42,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:42,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:42,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:42,176 INFO L87 Difference]: Start difference. First operand 2094 states and 5571 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) [2021-05-21 15:22:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:42,556 INFO L93 Difference]: Finished difference Result 4570 states and 11964 transitions. [2021-05-21 15:22:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:22:42,557 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 [2021-05-21 15:22:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:42,566 INFO L225 Difference]: With dead ends: 4570 [2021-05-21 15:22:42,566 INFO L226 Difference]: Without dead ends: 3833 [2021-05-21 15:22:42,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:42,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3833 states. [2021-05-21 15:22:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3833 to 2235. [2021-05-21 15:22:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 2.6965085049239033) internal successors, (6024), 2234 states have internal predecessors, (6024), 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) [2021-05-21 15:22:42,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 6024 transitions. [2021-05-21 15:22:42,629 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 6024 transitions. Word has length 47 [2021-05-21 15:22:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:42,630 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 6024 transitions. [2021-05-21 15:22:42,630 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) [2021-05-21 15:22:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 6024 transitions. [2021-05-21 15:22:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:42,634 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:42,634 INFO L521 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] [2021-05-21 15:22:42,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:42,857 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash 464719534, now seen corresponding path program 5 times [2021-05-21 15:22:42,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:42,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448539556] [2021-05-21 15:22:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:42,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:42,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448539556] [2021-05-21 15:22:42,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448539556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:42,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801356240] [2021-05-21 15:22:42,942 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 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 [2021-05-21 15:22:43,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:43,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:43,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:43,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:43,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801356240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:43,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:43,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:43,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397683300] [2021-05-21 15:22:43,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:43,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:43,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:43,215 INFO L87 Difference]: Start difference. First operand 2235 states and 6024 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) [2021-05-21 15:22:43,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:43,508 INFO L93 Difference]: Finished difference Result 4350 states and 11284 transitions. [2021-05-21 15:22:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:22:43,509 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 [2021-05-21 15:22:43,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:43,517 INFO L225 Difference]: With dead ends: 4350 [2021-05-21 15:22:43,517 INFO L226 Difference]: Without dead ends: 3958 [2021-05-21 15:22:43,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:22:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2021-05-21 15:22:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 2423. [2021-05-21 15:22:43,580 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) [2021-05-21 15:22:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2423 states to 2423 states and 6623 transitions. [2021-05-21 15:22:43,586 INFO L78 Accepts]: Start accepts. Automaton has 2423 states and 6623 transitions. Word has length 47 [2021-05-21 15:22:43,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:43,587 INFO L482 AbstractCegarLoop]: Abstraction has 2423 states and 6623 transitions. [2021-05-21 15:22:43,587 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) [2021-05-21 15:22:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 2423 states and 6623 transitions. [2021-05-21 15:22:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-21 15:22:43,591 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:43,591 INFO L521 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] [2021-05-21 15:22:43,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:43,816 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:43,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:43,816 INFO L82 PathProgramCache]: Analyzing trace with hash 920243988, now seen corresponding path program 6 times [2021-05-21 15:22:43,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:43,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275845695] [2021-05-21 15:22:43,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:43,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:43,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:43,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275845695] [2021-05-21 15:22:43,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275845695] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:43,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102653426] [2021-05-21 15:22:43,897 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 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 [2021-05-21 15:22:43,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 15:22:43,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:43,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:22:43,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:44,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:44,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102653426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:44,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:44,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-21 15:22:44,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075220270] [2021-05-21 15:22:44,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:22:44,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:44,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:22:44,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:22:44,140 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) [2021-05-21 15:22:44,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:44,789 INFO L93 Difference]: Finished difference Result 5771 states and 15228 transitions. [2021-05-21 15:22:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:22:44,789 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 [2021-05-21 15:22:44,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:44,802 INFO L225 Difference]: With dead ends: 5771 [2021-05-21 15:22:44,802 INFO L226 Difference]: Without dead ends: 4898 [2021-05-21 15:22:44,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 556.8ms TimeCoverageRelationStatistics Valid=381, Invalid=1425, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:22:44,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-05-21 15:22:44,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 2817. [2021-05-21 15:22:44,888 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) [2021-05-21 15:22:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 7651 transitions. [2021-05-21 15:22:44,895 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 7651 transitions. Word has length 47 [2021-05-21 15:22:44,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:44,896 INFO L482 AbstractCegarLoop]: Abstraction has 2817 states and 7651 transitions. [2021-05-21 15:22:44,896 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) [2021-05-21 15:22:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 7651 transitions. [2021-05-21 15:22:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:44,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:44,901 INFO L521 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] [2021-05-21 15:22:45,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:45,117 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash 117458473, now seen corresponding path program 7 times [2021-05-21 15:22:45,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:45,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183700710] [2021-05-21 15:22:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:45,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:45,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183700710] [2021-05-21 15:22:45,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183700710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:45,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940329977] [2021-05-21 15:22:45,233 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 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 [2021-05-21 15:22:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:45,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:45,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940329977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:45,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:45,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:45,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492932907] [2021-05-21 15:22:45,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:45,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:45,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:45,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:45,485 INFO L87 Difference]: Start difference. First operand 2817 states and 7651 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:45,728 INFO L93 Difference]: Finished difference Result 4391 states and 11330 transitions. [2021-05-21 15:22:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:22:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:45,737 INFO L225 Difference]: With dead ends: 4391 [2021-05-21 15:22:45,737 INFO L226 Difference]: Without dead ends: 3999 [2021-05-21 15:22:45,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:22:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-05-21 15:22:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 2932. [2021-05-21 15:22:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2932 states, 2931 states have (on average 2.6939611054247696) internal successors, (7896), 2931 states have internal predecessors, (7896), 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) [2021-05-21 15:22:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2932 states to 2932 states and 7896 transitions. [2021-05-21 15:22:45,800 INFO L78 Accepts]: Start accepts. Automaton has 2932 states and 7896 transitions. Word has length 52 [2021-05-21 15:22:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:45,800 INFO L482 AbstractCegarLoop]: Abstraction has 2932 states and 7896 transitions. [2021-05-21 15:22:45,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2932 states and 7896 transitions. [2021-05-21 15:22:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:45,805 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:45,805 INFO L521 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] [2021-05-21 15:22:46,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 15:22:46,021 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:46,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:46,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1743674851, now seen corresponding path program 1 times [2021-05-21 15:22:46,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:46,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537653333] [2021-05-21 15:22:46,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:46,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:46,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537653333] [2021-05-21 15:22:46,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537653333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:46,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433599464] [2021-05-21 15:22:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:46,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:46,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:46,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433599464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:46,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:46,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:46,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708061103] [2021-05-21 15:22:46,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:46,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:46,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:46,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:46,400 INFO L87 Difference]: Start difference. First operand 2932 states and 7896 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) [2021-05-21 15:22:46,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:46,634 INFO L93 Difference]: Finished difference Result 4087 states and 10594 transitions. [2021-05-21 15:22:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:46,634 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 [2021-05-21 15:22:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:46,640 INFO L225 Difference]: With dead ends: 4087 [2021-05-21 15:22:46,640 INFO L226 Difference]: Without dead ends: 3935 [2021-05-21 15:22:46,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:22:46,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-05-21 15:22:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 2982. [2021-05-21 15:22:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 2.6856759476685674) internal successors, (8006), 2981 states have internal predecessors, (8006), 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) [2021-05-21 15:22:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 8006 transitions. [2021-05-21 15:22:46,703 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 8006 transitions. Word has length 52 [2021-05-21 15:22:46,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:46,703 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 8006 transitions. [2021-05-21 15:22:46,703 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) [2021-05-21 15:22:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 8006 transitions. [2021-05-21 15:22:46,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:46,708 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:46,708 INFO L521 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] [2021-05-21 15:22:46,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 15:22:46,924 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1270346633, now seen corresponding path program 2 times [2021-05-21 15:22:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507516078] [2021-05-21 15:22:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:47,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:47,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507516078] [2021-05-21 15:22:47,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507516078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:47,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494668809] [2021-05-21 15:22:47,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:47,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:47,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:47,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:47,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:47,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494668809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:47,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:47,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:47,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114621223] [2021-05-21 15:22:47,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:47,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:47,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:47,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:47,267 INFO L87 Difference]: Start difference. First operand 2982 states and 8006 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) [2021-05-21 15:22:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:47,441 INFO L93 Difference]: Finished difference Result 3927 states and 10274 transitions. [2021-05-21 15:22:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:22:47,441 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 [2021-05-21 15:22:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:47,446 INFO L225 Difference]: With dead ends: 3927 [2021-05-21 15:22:47,446 INFO L226 Difference]: Without dead ends: 3775 [2021-05-21 15:22:47,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:22:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-05-21 15:22:47,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 2981. [2021-05-21 15:22:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2980 states have (on average 2.684228187919463) internal successors, (7999), 2980 states have internal predecessors, (7999), 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) [2021-05-21 15:22:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 7999 transitions. [2021-05-21 15:22:47,508 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 7999 transitions. Word has length 52 [2021-05-21 15:22:47,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:47,508 INFO L482 AbstractCegarLoop]: Abstraction has 2981 states and 7999 transitions. [2021-05-21 15:22:47,508 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) [2021-05-21 15:22:47,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 7999 transitions. [2021-05-21 15:22:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:47,514 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:47,514 INFO L521 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] [2021-05-21 15:22:47,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 15:22:47,740 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:47,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1887847499, now seen corresponding path program 8 times [2021-05-21 15:22:47,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:47,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643107836] [2021-05-21 15:22:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:47,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:47,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643107836] [2021-05-21 15:22:47,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643107836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:47,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567749049] [2021-05-21 15:22:47,825 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 [2021-05-21 15:22:47,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:47,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:48,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567749049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:48,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:48,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:48,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20905246] [2021-05-21 15:22:48,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:48,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:48,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:48,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:48,129 INFO L87 Difference]: Start difference. First operand 2981 states and 7999 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:48,403 INFO L93 Difference]: Finished difference Result 4796 states and 12155 transitions. [2021-05-21 15:22:48,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:22:48,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:48,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:48,409 INFO L225 Difference]: With dead ends: 4796 [2021-05-21 15:22:48,409 INFO L226 Difference]: Without dead ends: 4404 [2021-05-21 15:22:48,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:22:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-05-21 15:22:48,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 2956. [2021-05-21 15:22:48,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.688324873096447) internal successors, (7944), 2955 states have internal predecessors, (7944), 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) [2021-05-21 15:22:48,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7944 transitions. [2021-05-21 15:22:48,476 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7944 transitions. Word has length 52 [2021-05-21 15:22:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:48,476 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7944 transitions. [2021-05-21 15:22:48,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7944 transitions. [2021-05-21 15:22:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:48,480 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:48,480 INFO L521 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] [2021-05-21 15:22:48,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 15:22:48,683 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:48,684 INFO L82 PathProgramCache]: Analyzing trace with hash -275953247, now seen corresponding path program 9 times [2021-05-21 15:22:48,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:48,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810521167] [2021-05-21 15:22:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:48,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:48,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:48,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810521167] [2021-05-21 15:22:48,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810521167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:48,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217002762] [2021-05-21 15:22:48,758 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 [2021-05-21 15:22:48,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:48,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:48,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217002762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:48,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:48,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:48,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56088674] [2021-05-21 15:22:48,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:48,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:48,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:48,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:48,982 INFO L87 Difference]: Start difference. First operand 2956 states and 7944 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:49,342 INFO L93 Difference]: Finished difference Result 5543 states and 14338 transitions. [2021-05-21 15:22:49,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:22:49,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:49,348 INFO L225 Difference]: With dead ends: 5543 [2021-05-21 15:22:49,348 INFO L226 Difference]: Without dead ends: 5063 [2021-05-21 15:22:49,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=282, Invalid=978, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:22:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5063 states. [2021-05-21 15:22:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5063 to 3250. [2021-05-21 15:22:49,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3250 states, 3249 states have (on average 2.7331486611265006) internal successors, (8880), 3249 states have internal predecessors, (8880), 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) [2021-05-21 15:22:49,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 8880 transitions. [2021-05-21 15:22:49,424 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 8880 transitions. Word has length 52 [2021-05-21 15:22:49,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:49,424 INFO L482 AbstractCegarLoop]: Abstraction has 3250 states and 8880 transitions. [2021-05-21 15:22:49,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:49,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 8880 transitions. [2021-05-21 15:22:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:49,428 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:49,429 INFO L521 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] [2021-05-21 15:22:49,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 15:22:49,632 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash 179571207, now seen corresponding path program 10 times [2021-05-21 15:22:49,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:49,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482597909] [2021-05-21 15:22:49,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:49,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482597909] [2021-05-21 15:22:49,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482597909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:49,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831486781] [2021-05-21 15:22:49,756 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 [2021-05-21 15:22:49,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:49,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:49,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:50,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831486781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:50,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:50,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-21 15:22:50,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237674521] [2021-05-21 15:22:50,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:22:50,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:50,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:22:50,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:22:50,005 INFO L87 Difference]: Start difference. First operand 3250 states and 8880 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:50,743 INFO L93 Difference]: Finished difference Result 6631 states and 17538 transitions. [2021-05-21 15:22:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:22:50,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-05-21 15:22:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:50,750 INFO L225 Difference]: With dead ends: 6631 [2021-05-21 15:22:50,751 INFO L226 Difference]: Without dead ends: 5691 [2021-05-21 15:22:50,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 669.9ms TimeCoverageRelationStatistics Valid=536, Invalid=1914, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:22:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5691 states. [2021-05-21 15:22:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5691 to 3302. [2021-05-21 15:22:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3302 states, 3301 states have (on average 2.7197818842774915) internal successors, (8978), 3301 states have internal predecessors, (8978), 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) [2021-05-21 15:22:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3302 states to 3302 states and 8978 transitions. [2021-05-21 15:22:50,824 INFO L78 Accepts]: Start accepts. Automaton has 3302 states and 8978 transitions. Word has length 52 [2021-05-21 15:22:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:50,825 INFO L482 AbstractCegarLoop]: Abstraction has 3302 states and 8978 transitions. [2021-05-21 15:22:50,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3302 states and 8978 transitions. [2021-05-21 15:22:50,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:50,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:50,829 INFO L521 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] [2021-05-21 15:22:51,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:51,045 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:51,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:51,045 INFO L82 PathProgramCache]: Analyzing trace with hash -97531933, now seen corresponding path program 3 times [2021-05-21 15:22:51,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:51,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070968410] [2021-05-21 15:22:51,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:51,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:51,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070968410] [2021-05-21 15:22:51,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070968410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:51,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600435447] [2021-05-21 15:22:51,126 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 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 [2021-05-21 15:22:51,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:51,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:51,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:51,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:51,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600435447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:51,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:51,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:51,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202060164] [2021-05-21 15:22:51,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:51,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:51,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:51,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:51,396 INFO L87 Difference]: Start difference. First operand 3302 states and 8978 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) [2021-05-21 15:22:51,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:51,744 INFO L93 Difference]: Finished difference Result 5165 states and 13423 transitions. [2021-05-21 15:22:51,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:22:51,745 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 [2021-05-21 15:22:51,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:51,751 INFO L225 Difference]: With dead ends: 5165 [2021-05-21 15:22:51,751 INFO L226 Difference]: Without dead ends: 5013 [2021-05-21 15:22:51,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:22:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5013 states. [2021-05-21 15:22:51,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5013 to 3472. [2021-05-21 15:22:51,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3472 states, 3471 states have (on average 2.746182656295016) internal successors, (9532), 3471 states have internal predecessors, (9532), 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) [2021-05-21 15:22:51,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3472 states to 3472 states and 9532 transitions. [2021-05-21 15:22:51,816 INFO L78 Accepts]: Start accepts. Automaton has 3472 states and 9532 transitions. Word has length 52 [2021-05-21 15:22:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:51,816 INFO L482 AbstractCegarLoop]: Abstraction has 3472 states and 9532 transitions. [2021-05-21 15:22:51,816 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) [2021-05-21 15:22:51,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3472 states and 9532 transitions. [2021-05-21 15:22:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:51,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:51,821 INFO L521 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] [2021-05-21 15:22:52,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 15:22:52,045 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1811410767, now seen corresponding path program 4 times [2021-05-21 15:22:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:52,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968496572] [2021-05-21 15:22:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:52,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:52,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968496572] [2021-05-21 15:22:52,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968496572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:52,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341530037] [2021-05-21 15:22:52,124 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 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 [2021-05-21 15:22:52,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:22:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:52,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:52,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341530037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:52,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:52,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385585973] [2021-05-21 15:22:52,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:52,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:52,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:52,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:52,362 INFO L87 Difference]: Start difference. First operand 3472 states and 9532 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) [2021-05-21 15:22:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:52,744 INFO L93 Difference]: Finished difference Result 5629 states and 14961 transitions. [2021-05-21 15:22:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:22:52,744 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 [2021-05-21 15:22:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:52,751 INFO L225 Difference]: With dead ends: 5629 [2021-05-21 15:22:52,751 INFO L226 Difference]: Without dead ends: 5477 [2021-05-21 15:22:52,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:52,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5477 states. [2021-05-21 15:22:52,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5477 to 3560. [2021-05-21 15:22:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3560 states, 3559 states have (on average 2.766226468109019) internal successors, (9845), 3559 states have internal predecessors, (9845), 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) [2021-05-21 15:22:52,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3560 states to 3560 states and 9845 transitions. [2021-05-21 15:22:52,870 INFO L78 Accepts]: Start accepts. Automaton has 3560 states and 9845 transitions. Word has length 52 [2021-05-21 15:22:52,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:52,870 INFO L482 AbstractCegarLoop]: Abstraction has 3560 states and 9845 transitions. [2021-05-21 15:22:52,871 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) [2021-05-21 15:22:52,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3560 states and 9845 transitions. [2021-05-21 15:22:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-21 15:22:52,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:52,876 INFO L521 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] [2021-05-21 15:22:53,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:53,093 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1680986989, now seen corresponding path program 5 times [2021-05-21 15:22:53,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:53,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795650505] [2021-05-21 15:22:53,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:53,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:53,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795650505] [2021-05-21 15:22:53,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795650505] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:53,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294104049] [2021-05-21 15:22:53,190 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:53,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:22:53,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:22:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:53,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294104049] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:53,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:53,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 15:22:53,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175799994] [2021-05-21 15:22:53,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:22:53,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:53,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:22:53,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:22:53,425 INFO L87 Difference]: Start difference. First operand 3560 states and 9845 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) [2021-05-21 15:22:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:54,015 INFO L93 Difference]: Finished difference Result 6909 states and 18691 transitions. [2021-05-21 15:22:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:22:54,015 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 [2021-05-21 15:22:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:54,022 INFO L225 Difference]: With dead ends: 6909 [2021-05-21 15:22:54,022 INFO L226 Difference]: Without dead ends: 6479 [2021-05-21 15:22:54,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 533.4ms TimeCoverageRelationStatistics Valid=470, Invalid=1510, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:22:54,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6479 states. [2021-05-21 15:22:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6479 to 3764. [2021-05-21 15:22:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3764 states, 3763 states have (on average 2.766941270263088) internal successors, (10412), 3763 states have internal predecessors, (10412), 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) [2021-05-21 15:22:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3764 states to 3764 states and 10412 transitions. [2021-05-21 15:22:54,101 INFO L78 Accepts]: Start accepts. Automaton has 3764 states and 10412 transitions. Word has length 52 [2021-05-21 15:22:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:54,101 INFO L482 AbstractCegarLoop]: Abstraction has 3764 states and 10412 transitions. [2021-05-21 15:22:54,101 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) [2021-05-21 15:22:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3764 states and 10412 transitions. [2021-05-21 15:22:54,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:54,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:54,107 INFO L521 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] [2021-05-21 15:22:54,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 15:22:54,321 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:54,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1005538624, now seen corresponding path program 11 times [2021-05-21 15:22:54,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:54,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341085788] [2021-05-21 15:22:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:54,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:54,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341085788] [2021-05-21 15:22:54,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341085788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:54,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705007171] [2021-05-21 15:22:54,413 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:54,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:22:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:54,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:54,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:54,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:54,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705007171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:54,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:54,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:54,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281829378] [2021-05-21 15:22:54,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:54,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:54,686 INFO L87 Difference]: Start difference. First operand 3764 states and 10412 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:54,877 INFO L93 Difference]: Finished difference Result 5044 states and 13383 transitions. [2021-05-21 15:22:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 15:22:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:54,883 INFO L225 Difference]: With dead ends: 5044 [2021-05-21 15:22:54,883 INFO L226 Difference]: Without dead ends: 4892 [2021-05-21 15:22:54,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 227.3ms TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:22:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2021-05-21 15:22:54,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 3839. [2021-05-21 15:22:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 2.755862428348098) internal successors, (10577), 3838 states have internal predecessors, (10577), 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) [2021-05-21 15:22:54,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 10577 transitions. [2021-05-21 15:22:54,954 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 10577 transitions. Word has length 57 [2021-05-21 15:22:54,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:54,954 INFO L482 AbstractCegarLoop]: Abstraction has 3839 states and 10577 transitions. [2021-05-21 15:22:54,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 10577 transitions. [2021-05-21 15:22:54,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:54,960 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:54,960 INFO L521 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] [2021-05-21 15:22:55,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 15:22:55,177 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:55,177 INFO L82 PathProgramCache]: Analyzing trace with hash 845130068, now seen corresponding path program 12 times [2021-05-21 15:22:55,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:55,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006012643] [2021-05-21 15:22:55,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:55,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:55,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006012643] [2021-05-21 15:22:55,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006012643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:55,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752310372] [2021-05-21 15:22:55,268 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:55,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:22:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:55,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:55,544 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:55,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752310372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:55,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:55,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:22:55,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138145809] [2021-05-21 15:22:55,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:22:55,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:55,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:22:55,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:22:55,545 INFO L87 Difference]: Start difference. First operand 3839 states and 10577 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:55,824 INFO L93 Difference]: Finished difference Result 5180 states and 13655 transitions. [2021-05-21 15:22:55,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:22:55,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:22:55,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:55,831 INFO L225 Difference]: With dead ends: 5180 [2021-05-21 15:22:55,831 INFO L226 Difference]: Without dead ends: 5028 [2021-05-21 15:22:55,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 291.0ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:22:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-05-21 15:22:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 3839. [2021-05-21 15:22:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 2.755862428348098) internal successors, (10577), 3838 states have internal predecessors, (10577), 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) [2021-05-21 15:22:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 10577 transitions. [2021-05-21 15:22:55,886 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 10577 transitions. Word has length 57 [2021-05-21 15:22:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:55,886 INFO L482 AbstractCegarLoop]: Abstraction has 3839 states and 10577 transitions. [2021-05-21 15:22:55,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:22:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 10577 transitions. [2021-05-21 15:22:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:55,891 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:55,891 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:56,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 15:22:56,097 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:56,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1016003256, now seen corresponding path program 6 times [2021-05-21 15:22:56,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:56,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568396891] [2021-05-21 15:22:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:56,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568396891] [2021-05-21 15:22:56,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568396891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946399796] [2021-05-21 15:22:56,187 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:56,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 15:22:56,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:56,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:56,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:56,490 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:56,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946399796] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:56,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:56,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:56,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239415130] [2021-05-21 15:22:56,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:56,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:56,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:56,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:56,492 INFO L87 Difference]: Start difference. First operand 3839 states and 10577 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) [2021-05-21 15:22:56,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:56,781 INFO L93 Difference]: Finished difference Result 5324 states and 13943 transitions. [2021-05-21 15:22:56,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:22:56,781 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 [2021-05-21 15:22:56,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:56,787 INFO L225 Difference]: With dead ends: 5324 [2021-05-21 15:22:56,787 INFO L226 Difference]: Without dead ends: 5172 [2021-05-21 15:22:56,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=234, Invalid=636, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:22:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-05-21 15:22:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 3904. [2021-05-21 15:22:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.74583653599795) internal successors, (10717), 3903 states have internal predecessors, (10717), 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) [2021-05-21 15:22:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 10717 transitions. [2021-05-21 15:22:56,851 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 10717 transitions. Word has length 57 [2021-05-21 15:22:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:56,851 INFO L482 AbstractCegarLoop]: Abstraction has 3904 states and 10717 transitions. [2021-05-21 15:22:56,851 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) [2021-05-21 15:22:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 10717 transitions. [2021-05-21 15:22:56,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:56,857 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:56,857 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:57,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 15:22:57,073 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash -542675038, now seen corresponding path program 7 times [2021-05-21 15:22:57,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:57,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751553283] [2021-05-21 15:22:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:57,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751553283] [2021-05-21 15:22:57,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751553283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501407232] [2021-05-21 15:22:57,178 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:57,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:57,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:57,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:57,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:57,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501407232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:57,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:57,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:57,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472435437] [2021-05-21 15:22:57,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:57,471 INFO L87 Difference]: Start difference. First operand 3904 states and 10717 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) [2021-05-21 15:22:57,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:57,734 INFO L93 Difference]: Finished difference Result 5195 states and 13680 transitions. [2021-05-21 15:22:57,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:22:57,735 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 [2021-05-21 15:22:57,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:57,740 INFO L225 Difference]: With dead ends: 5195 [2021-05-21 15:22:57,740 INFO L226 Difference]: Without dead ends: 5043 [2021-05-21 15:22:57,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 296.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:22:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2021-05-21 15:22:57,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 3869. [2021-05-21 15:22:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.750775594622544) internal successors, (10640), 3868 states have internal predecessors, (10640), 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) [2021-05-21 15:22:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 10640 transitions. [2021-05-21 15:22:57,806 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 10640 transitions. Word has length 57 [2021-05-21 15:22:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:57,807 INFO L482 AbstractCegarLoop]: Abstraction has 3869 states and 10640 transitions. [2021-05-21 15:22:57,807 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) [2021-05-21 15:22:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 10640 transitions. [2021-05-21 15:22:57,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:57,812 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:57,812 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:58,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:58,029 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:58,029 INFO L82 PathProgramCache]: Analyzing trace with hash 509542868, now seen corresponding path program 8 times [2021-05-21 15:22:58,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:58,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715659161] [2021-05-21 15:22:58,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:58,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:58,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:58,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715659161] [2021-05-21 15:22:58,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715659161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:58,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720780537] [2021-05-21 15:22:58,137 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:58,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:22:58,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:58,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:58,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:58,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720780537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:58,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:58,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:58,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732406813] [2021-05-21 15:22:58,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:58,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:58,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:58,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:58,430 INFO L87 Difference]: Start difference. First operand 3869 states and 10640 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) [2021-05-21 15:22:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:58,725 INFO L93 Difference]: Finished difference Result 5377 states and 14042 transitions. [2021-05-21 15:22:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:22:58,726 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 [2021-05-21 15:22:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:58,730 INFO L225 Difference]: With dead ends: 5377 [2021-05-21 15:22:58,730 INFO L226 Difference]: Without dead ends: 5225 [2021-05-21 15:22:58,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=256, Invalid=736, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:22:58,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5225 states. [2021-05-21 15:22:58,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5225 to 3974. [2021-05-21 15:22:58,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3974 states, 3973 states have (on average 2.7362194815001257) internal successors, (10871), 3973 states have internal predecessors, (10871), 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) [2021-05-21 15:22:58,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 10871 transitions. [2021-05-21 15:22:58,774 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 10871 transitions. Word has length 57 [2021-05-21 15:22:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:58,774 INFO L482 AbstractCegarLoop]: Abstraction has 3974 states and 10871 transitions. [2021-05-21 15:22:58,775 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) [2021-05-21 15:22:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 10871 transitions. [2021-05-21 15:22:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:58,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:58,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:58,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 15:22:58,980 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:58,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:58,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1535792180, now seen corresponding path program 9 times [2021-05-21 15:22:58,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:58,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418832327] [2021-05-21 15:22:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:22:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:22:59,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418832327] [2021-05-21 15:22:59,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418832327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453586686] [2021-05-21 15:22:59,067 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:22:59,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:22:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:22:59,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:22:59,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:22:59,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:22:59,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453586686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:22:59,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:22:59,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:22:59,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823414196] [2021-05-21 15:22:59,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:22:59,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:22:59,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:22:59,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:22:59,333 INFO L87 Difference]: Start difference. First operand 3974 states and 10871 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) [2021-05-21 15:22:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:22:59,701 INFO L93 Difference]: Finished difference Result 5481 states and 14250 transitions. [2021-05-21 15:22:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:22:59,701 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 [2021-05-21 15:22:59,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:22:59,708 INFO L225 Difference]: With dead ends: 5481 [2021-05-21 15:22:59,709 INFO L226 Difference]: Without dead ends: 5329 [2021-05-21 15:22:59,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=294, Invalid=828, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:22:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-05-21 15:22:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 3943. [2021-05-21 15:22:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3942 states have (on average 2.73921867072552) internal successors, (10798), 3942 states have internal predecessors, (10798), 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) [2021-05-21 15:22:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 10798 transitions. [2021-05-21 15:22:59,773 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 10798 transitions. Word has length 57 [2021-05-21 15:22:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:22:59,773 INFO L482 AbstractCegarLoop]: Abstraction has 3943 states and 10798 transitions. [2021-05-21 15:22:59,773 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) [2021-05-21 15:22:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 10798 transitions. [2021-05-21 15:22:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:22:59,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:22:59,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:22:59,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 15:22:59,989 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:22:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:22:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash -723248218, now seen corresponding path program 10 times [2021-05-21 15:22:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:22:59,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108495157] [2021-05-21 15:22:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:22:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:00,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:00,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108495157] [2021-05-21 15:23:00,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108495157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:00,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876952846] [2021-05-21 15:23:00,077 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:00,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:23:00,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:00,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:00,357 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:00,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876952846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:00,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:00,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:23:00,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763310355] [2021-05-21 15:23:00,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:23:00,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:00,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:23:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:23:00,359 INFO L87 Difference]: Start difference. First operand 3943 states and 10798 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) [2021-05-21 15:23:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:00,684 INFO L93 Difference]: Finished difference Result 5465 states and 14218 transitions. [2021-05-21 15:23:00,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:23:00,685 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 [2021-05-21 15:23:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:00,690 INFO L225 Difference]: With dead ends: 5465 [2021-05-21 15:23:00,690 INFO L226 Difference]: Without dead ends: 5313 [2021-05-21 15:23:00,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 384.1ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:23:00,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-05-21 15:23:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 3903. [2021-05-21 15:23:00,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 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) [2021-05-21 15:23:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-05-21 15:23:00,746 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-05-21 15:23:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:00,746 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-05-21 15:23:00,746 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) [2021-05-21 15:23:00,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-05-21 15:23:00,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:00,750 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:00,750 INFO L521 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] [2021-05-21 15:23:00,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:00,950 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:00,951 INFO L82 PathProgramCache]: Analyzing trace with hash 891212980, now seen corresponding path program 13 times [2021-05-21 15:23:00,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:00,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263545335] [2021-05-21 15:23:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:01,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:01,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263545335] [2021-05-21 15:23:01,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263545335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:01,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603198216] [2021-05-21 15:23:01,048 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:01,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:01,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:01,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603198216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:01,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:01,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:01,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366841322] [2021-05-21 15:23:01,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:01,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:01,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:01,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:01,296 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:01,486 INFO L93 Difference]: Finished difference Result 5284 states and 13871 transitions. [2021-05-21 15:23:01,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:23:01,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:01,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:01,493 INFO L225 Difference]: With dead ends: 5284 [2021-05-21 15:23:01,493 INFO L226 Difference]: Without dead ends: 5132 [2021-05-21 15:23:01,494 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:23:01,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-05-21 15:23:01,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 3953. [2021-05-21 15:23:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 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) [2021-05-21 15:23:01,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-05-21 15:23:01,550 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-05-21 15:23:01,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:01,550 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-05-21 15:23:01,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-05-21 15:23:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:01,556 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:01,556 INFO L521 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] [2021-05-21 15:23:01,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 15:23:01,765 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1553085624, now seen corresponding path program 14 times [2021-05-21 15:23:01,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:01,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705699122] [2021-05-21 15:23:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:01,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:01,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705699122] [2021-05-21 15:23:01,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705699122] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:01,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814908470] [2021-05-21 15:23:01,859 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:01,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:23:01,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:01,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:01,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:02,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814908470] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:02,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:02,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:02,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796692025] [2021-05-21 15:23:02,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:02,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:02,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:02,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:02,128 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:02,387 INFO L93 Difference]: Finished difference Result 5525 states and 14358 transitions. [2021-05-21 15:23:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:23:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:02,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:02,395 INFO L225 Difference]: With dead ends: 5525 [2021-05-21 15:23:02,395 INFO L226 Difference]: Without dead ends: 5373 [2021-05-21 15:23:02,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 266.7ms TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:23:02,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5373 states. [2021-05-21 15:23:02,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5373 to 3953. [2021-05-21 15:23:02,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 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) [2021-05-21 15:23:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-05-21 15:23:02,471 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-05-21 15:23:02,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:02,471 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-05-21 15:23:02,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:02,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-05-21 15:23:02,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:02,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:02,475 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:23:02,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:02,677 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:02,677 INFO L82 PathProgramCache]: Analyzing trace with hash 880748348, now seen corresponding path program 11 times [2021-05-21 15:23:02,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:02,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001269508] [2021-05-21 15:23:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:02,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:02,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001269508] [2021-05-21 15:23:02,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001269508] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:02,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889750253] [2021-05-21 15:23:02,760 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:02,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:23:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889750253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:03,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:03,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:23:03,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657849231] [2021-05-21 15:23:03,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:23:03,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:03,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:23:03,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:23:03,024 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 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) [2021-05-21 15:23:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:03,340 INFO L93 Difference]: Finished difference Result 5660 states and 14623 transitions. [2021-05-21 15:23:03,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:23:03,341 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 [2021-05-21 15:23:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:03,348 INFO L225 Difference]: With dead ends: 5660 [2021-05-21 15:23:03,348 INFO L226 Difference]: Without dead ends: 5508 [2021-05-21 15:23:03,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:23:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-05-21 15:23:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 3953. [2021-05-21 15:23:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 2.7378542510121457) internal successors, (10820), 3952 states have internal predecessors, (10820), 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) [2021-05-21 15:23:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 10820 transitions. [2021-05-21 15:23:03,416 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 10820 transitions. Word has length 57 [2021-05-21 15:23:03,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:03,416 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 10820 transitions. [2021-05-21 15:23:03,416 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) [2021-05-21 15:23:03,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 10820 transitions. [2021-05-21 15:23:03,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:03,421 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:03,421 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:23:03,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 15:23:03,637 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1354076566, now seen corresponding path program 12 times [2021-05-21 15:23:03,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:03,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212163648] [2021-05-21 15:23:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:03,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:03,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:03,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:03,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212163648] [2021-05-21 15:23:03,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212163648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:03,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951615099] [2021-05-21 15:23:03,720 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:03,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:23:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:03,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:03,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951615099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:03,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:03,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-21 15:23:03,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61126913] [2021-05-21 15:23:03,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:23:03,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:03,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:23:03,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:23:03,973 INFO L87 Difference]: Start difference. First operand 3953 states and 10820 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) [2021-05-21 15:23:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:04,284 INFO L93 Difference]: Finished difference Result 5465 states and 14218 transitions. [2021-05-21 15:23:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:23:04,284 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 [2021-05-21 15:23:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:04,289 INFO L225 Difference]: With dead ends: 5465 [2021-05-21 15:23:04,289 INFO L226 Difference]: Without dead ends: 5313 [2021-05-21 15:23:04,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 317.3ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:23:04,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-05-21 15:23:04,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 3878. [2021-05-21 15:23:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7482589631158114) internal successors, (10655), 3877 states have internal predecessors, (10655), 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) [2021-05-21 15:23:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10655 transitions. [2021-05-21 15:23:04,341 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10655 transitions. Word has length 57 [2021-05-21 15:23:04,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:04,342 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10655 transitions. [2021-05-21 15:23:04,342 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) [2021-05-21 15:23:04,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10655 transitions. [2021-05-21 15:23:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:04,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:04,346 INFO L521 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] [2021-05-21 15:23:04,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 15:23:04,546 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1028549134, now seen corresponding path program 15 times [2021-05-21 15:23:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:04,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283362386] [2021-05-21 15:23:04,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:04,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:04,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283362386] [2021-05-21 15:23:04,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283362386] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:04,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891214833] [2021-05-21 15:23:04,630 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:04,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:23:04,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:04,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:04,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891214833] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:04,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:04,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:04,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416229096] [2021-05-21 15:23:04,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:04,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:04,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:04,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:04,867 INFO L87 Difference]: Start difference. First operand 3878 states and 10655 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:05,052 INFO L93 Difference]: Finished difference Result 5289 states and 13896 transitions. [2021-05-21 15:23:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:23:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:05,057 INFO L225 Difference]: With dead ends: 5289 [2021-05-21 15:23:05,057 INFO L226 Difference]: Without dead ends: 5137 [2021-05-21 15:23:05,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 210.8ms TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:23:05,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5137 states. [2021-05-21 15:23:05,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5137 to 3903. [2021-05-21 15:23:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 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) [2021-05-21 15:23:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-05-21 15:23:05,106 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-05-21 15:23:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:05,106 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-05-21 15:23:05,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:05,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-05-21 15:23:05,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:05,111 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:05,111 INFO L521 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] [2021-05-21 15:23:05,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-21 15:23:05,325 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:05,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:05,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1415749470, now seen corresponding path program 16 times [2021-05-21 15:23:05,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:05,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603611150] [2021-05-21 15:23:05,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:05,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:05,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603611150] [2021-05-21 15:23:05,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603611150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:05,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908124103] [2021-05-21 15:23:05,407 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:05,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:23:05,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:05,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:05,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:05,648 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:05,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908124103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:05,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:05,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:05,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621600014] [2021-05-21 15:23:05,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:05,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:05,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:05,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:05,650 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:05,906 INFO L93 Difference]: Finished difference Result 5505 states and 14328 transitions. [2021-05-21 15:23:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:23:05,906 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:05,911 INFO L225 Difference]: With dead ends: 5505 [2021-05-21 15:23:05,912 INFO L226 Difference]: Without dead ends: 5353 [2021-05-21 15:23:05,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=218, Invalid=594, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:23:05,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-05-21 15:23:05,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3903. [2021-05-21 15:23:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 2.744746283956945) internal successors, (10710), 3902 states have internal predecessors, (10710), 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) [2021-05-21 15:23:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 10710 transitions. [2021-05-21 15:23:05,986 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 10710 transitions. Word has length 57 [2021-05-21 15:23:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:05,987 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 10710 transitions. [2021-05-21 15:23:05,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 10710 transitions. [2021-05-21 15:23:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:05,990 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:05,990 INFO L521 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] [2021-05-21 15:23:06,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:06,191 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:06,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:06,191 INFO L82 PathProgramCache]: Analyzing trace with hash 955868276, now seen corresponding path program 17 times [2021-05-21 15:23:06,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:06,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758902514] [2021-05-21 15:23:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:06,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:06,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758902514] [2021-05-21 15:23:06,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758902514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:06,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010758768] [2021-05-21 15:23:06,272 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:06,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:23:06,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:06,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:06,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:06,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010758768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:06,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:23:06,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-21 15:23:06,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128436802] [2021-05-21 15:23:06,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:23:06,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:23:06,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:23:06,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:23:06,503 INFO L87 Difference]: Start difference. First operand 3903 states and 10710 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:23:06,711 INFO L93 Difference]: Finished difference Result 5274 states and 13871 transitions. [2021-05-21 15:23:06,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:23:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-05-21 15:23:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:23:06,717 INFO L225 Difference]: With dead ends: 5274 [2021-05-21 15:23:06,717 INFO L226 Difference]: Without dead ends: 5122 [2021-05-21 15:23:06,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 222.0ms TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:23:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2021-05-21 15:23:06,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 3878. [2021-05-21 15:23:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.7482589631158114) internal successors, (10655), 3877 states have internal predecessors, (10655), 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) [2021-05-21 15:23:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10655 transitions. [2021-05-21 15:23:06,768 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10655 transitions. Word has length 57 [2021-05-21 15:23:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:23:06,768 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10655 transitions. [2021-05-21 15:23:06,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:23:06,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10655 transitions. [2021-05-21 15:23:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-21 15:23:06,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:23:06,772 INFO L521 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] [2021-05-21 15:23:06,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-21 15:23:06,973 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:23:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:23:06,973 INFO L82 PathProgramCache]: Analyzing trace with hash -884485368, now seen corresponding path program 18 times [2021-05-21 15:23:06,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:23:06,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518471998] [2021-05-21 15:23:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:23:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:23:07,058 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:23:07,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:23:07,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518471998] [2021-05-21 15:23:07,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518471998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:23:07,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329000247] [2021-05-21 15:23:07,058 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:23:07,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:23:07,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:23:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:23:07,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:23:10,601 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 3306 DAG size of output: 3299 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown