/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 17:52:53,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:52:53,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:52:53,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 17:52:53,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 17:52:53,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 17:52:53,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 17:52:53,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 17:52:53,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 17:52:53,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 17:52:53,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 17:52:53,601 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 17:52:53,601 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 17:52:53,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 17:52:53,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 17:52:53,604 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 17:52:53,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 17:52:53,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 17:52:53,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 17:52:53,612 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 17:52:53,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 17:52:53,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 17:52:53,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 17:52:53,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 17:52:53,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 17:52:53,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 17:52:53,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 17:52:53,627 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 17:52:53,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-05 17:52:53,654 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:52:53,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:52:53,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:52:53,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:52:53,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:52:53,657 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:52:53,657 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:52:53,657 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:52:53,658 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:52:53,658 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:52:53,658 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:52:53,658 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:52:53,658 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:52:53,659 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:52:53,659 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:52:53,660 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:52:53,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:52:53,661 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:52:53,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:52:53,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:52:53,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:52:53,987 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 17:52:53,988 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 17:52:53,988 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-06-05 17:52:54,033 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a530b3b3e/2d5a2faab32e4118ac2e8e254919c696/FLAG68c46a328 [2021-06-05 17:52:54,481 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 17:52:54,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-2.i [2021-06-05 17:52:54,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a530b3b3e/2d5a2faab32e4118ac2e8e254919c696/FLAG68c46a328 [2021-06-05 17:52:54,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a530b3b3e/2d5a2faab32e4118ac2e8e254919c696 [2021-06-05 17:52:54,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:52:54,848 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 17:52:54,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:54,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 17:52:54,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 17:52:54,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:54" (1/1) ... [2021-06-05 17:52:54,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9125480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:54, skipping insertion in model container [2021-06-05 17:52:54,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 05:52:54" (1/1) ... [2021-06-05 17:52:54,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 17:52:54,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 17:52:55,113 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-2.i[30929,30942] [2021-06-05 17:52:55,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:55,123 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 17:52:55,159 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-2.i[30929,30942] [2021-06-05 17:52:55,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 17:52:55,195 INFO L208 MainTranslator]: Completed translation [2021-06-05 17:52:55,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55 WrapperNode [2021-06-05 17:52:55,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 17:52:55,196 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:55,196 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:52:55,196 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:52:55,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:52:55,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:52:55,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:52:55,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:52:55,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,232 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... [2021-06-05 17:52:55,233 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:52:55,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:52:55,234 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:52:55,234 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:52:55,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:52:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 17:52:55,595 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 17:52:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 17:52:55,596 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 17:52:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 17:52:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 17:52:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 17:52:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 17:52:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 17:52:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 17:52:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:52:55,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:52:55,597 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 17:52:55,927 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:52:55,927 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 17:52:55,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:55 BoogieIcfgContainer [2021-06-05 17:52:55,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:52:55,931 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:52:55,931 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:52:55,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:52:55,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 05:52:54" (1/3) ... [2021-06-05 17:52:55,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ebf36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:52:55, skipping insertion in model container [2021-06-05 17:52:55,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 05:52:55" (2/3) ... [2021-06-05 17:52:55,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29ebf36b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:52:55, skipping insertion in model container [2021-06-05 17:52:55,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:52:55" (3/3) ... [2021-06-05 17:52:55,935 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2021-06-05 17:52:55,939 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:52:55,939 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:52:55,939 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:52:55,940 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,965 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,966 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,967 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,967 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,968 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,968 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,968 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,969 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,969 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,969 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,970 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,970 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,970 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,970 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,971 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,972 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,972 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,972 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,972 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,974 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,974 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,974 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,974 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,974 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,974 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,974 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,975 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,975 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,975 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,976 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,976 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,976 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,981 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 17:52:55,982 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 17:52:55,996 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 17:52:56,011 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:52:56,011 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:52:56,011 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:52:56,011 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:52:56,011 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:52:56,011 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:52:56,011 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:52:56,011 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 17:52:56,017 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 68 transitions, 146 flow [2021-06-05 17:52:56,087 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 17:52:56,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:56,099 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:56,100 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2133486681, now seen corresponding path program 1 times [2021-06-05 17:52:56,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:56,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311984853] [2021-06-05 17:52:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:56,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:56,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:56,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:56,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311984853] [2021-06-05 17:52:56,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311984853] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:56,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:56,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 17:52:56,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469724838] [2021-06-05 17:52:56,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 17:52:56,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:56,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 17:52:56,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 17:52:56,409 INFO L87 Difference]: Start difference. First operand has 2022 states, 2020 states have (on average 3.127722772277228) internal successors, (6318), 2021 states have internal predecessors, (6318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:56,621 INFO L93 Difference]: Finished difference Result 3996 states and 11572 transitions. [2021-06-05 17:52:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:52:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 17:52:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:56,643 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 17:52:56,643 INFO L226 Difference]: Without dead ends: 1425 [2021-06-05 17:52:56,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:52:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2021-06-05 17:52:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1120. [2021-06-05 17:52:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 2.7184986595174263) internal successors, (3042), 1119 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3042 transitions. [2021-06-05 17:52:56,718 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3042 transitions. Word has length 32 [2021-06-05 17:52:56,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:56,718 INFO L482 AbstractCegarLoop]: Abstraction has 1120 states and 3042 transitions. [2021-06-05 17:52:56,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3042 transitions. [2021-06-05 17:52:56,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:56,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:56,721 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:56,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:52:56,721 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:56,721 INFO L82 PathProgramCache]: Analyzing trace with hash 352608555, now seen corresponding path program 1 times [2021-06-05 17:52:56,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:56,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478541234] [2021-06-05 17:52:56,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:56,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:56,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478541234] [2021-06-05 17:52:56,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478541234] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:56,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:56,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:56,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216263970] [2021-06-05 17:52:56,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:56,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:56,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:56,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:56,805 INFO L87 Difference]: Start difference. First operand 1120 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:56,901 INFO L93 Difference]: Finished difference Result 2025 states and 5412 transitions. [2021-06-05 17:52:56,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:56,901 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 [2021-06-05 17:52:56,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:56,911 INFO L225 Difference]: With dead ends: 2025 [2021-06-05 17:52:56,911 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 17:52:56,912 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:56,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 17:52:56,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1270. [2021-06-05 17:52:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1269 states have (on average 2.7328605200945626) internal successors, (3468), 1269 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 3468 transitions. [2021-06-05 17:52:56,943 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 3468 transitions. Word has length 37 [2021-06-05 17:52:56,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:56,944 INFO L482 AbstractCegarLoop]: Abstraction has 1270 states and 3468 transitions. [2021-06-05 17:52:56,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:56,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 3468 transitions. [2021-06-05 17:52:56,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:56,946 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:56,946 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:56,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:52:56,947 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:56,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1453251019, now seen corresponding path program 1 times [2021-06-05 17:52:56,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:56,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015077890] [2021-06-05 17:52:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015077890] [2021-06-05 17:52:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015077890] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062514490] [2021-06-05 17:52:57,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:57,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:57,046 INFO L87 Difference]: Start difference. First operand 1270 states and 3468 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,136 INFO L93 Difference]: Finished difference Result 2062 states and 5444 transitions. [2021-06-05 17:52:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:57,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:57,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,142 INFO L225 Difference]: With dead ends: 2062 [2021-06-05 17:52:57,142 INFO L226 Difference]: Without dead ends: 1758 [2021-06-05 17:52:57,142 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-06-05 17:52:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1397. [2021-06-05 17:52:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.683381088825215) internal successors, (3746), 1396 states have internal predecessors, (3746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 3746 transitions. [2021-06-05 17:52:57,168 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 3746 transitions. Word has length 37 [2021-06-05 17:52:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,168 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 3746 transitions. [2021-06-05 17:52:57,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 3746 transitions. [2021-06-05 17:52:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 17:52:57,170 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,170 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:57,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 17:52:57,170 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:57,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1253658815, now seen corresponding path program 2 times [2021-06-05 17:52:57,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:57,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494682612] [2021-06-05 17:52:57,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:57,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494682612] [2021-06-05 17:52:57,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494682612] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:57,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:57,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 17:52:57,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116804692] [2021-06-05 17:52:57,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:52:57,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:52:57,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:52:57,258 INFO L87 Difference]: Start difference. First operand 1397 states and 3746 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,340 INFO L93 Difference]: Finished difference Result 2318 states and 6148 transitions. [2021-06-05 17:52:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:52:57,341 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 17:52:57,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,348 INFO L225 Difference]: With dead ends: 2318 [2021-06-05 17:52:57,348 INFO L226 Difference]: Without dead ends: 1987 [2021-06-05 17:52:57,349 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:52:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1987 states. [2021-06-05 17:52:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1987 to 1514. [2021-06-05 17:52:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 2.701916721744878) internal successors, (4088), 1513 states have internal predecessors, (4088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 4088 transitions. [2021-06-05 17:52:57,384 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 4088 transitions. Word has length 37 [2021-06-05 17:52:57,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,387 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 4088 transitions. [2021-06-05 17:52:57,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 4088 transitions. [2021-06-05 17:52:57,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:57,389 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,389 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:57,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 17:52:57,389 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 476803984, now seen corresponding path program 1 times [2021-06-05 17:52:57,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:57,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654267058] [2021-06-05 17:52:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:57,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654267058] [2021-06-05 17:52:57,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654267058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:57,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717145887] [2021-06-05 17:52:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:57,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:52:57,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:52:57,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:57,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717145887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:57,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:52:57,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:52:57,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78466572] [2021-06-05 17:52:57,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:52:57,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:57,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:52:57,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:52:57,789 INFO L87 Difference]: Start difference. First operand 1514 states and 4088 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:57,948 INFO L93 Difference]: Finished difference Result 2931 states and 7780 transitions. [2021-06-05 17:52:57,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:52:57,949 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:57,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:57,957 INFO L225 Difference]: With dead ends: 2931 [2021-06-05 17:52:57,958 INFO L226 Difference]: Without dead ends: 2549 [2021-06-05 17:52:57,958 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:52:57,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2549 states. [2021-06-05 17:52:57,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2549 to 1814. [2021-06-05 17:52:57,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.724765581908439) internal successors, (4940), 1813 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4940 transitions. [2021-06-05 17:52:57,996 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4940 transitions. Word has length 42 [2021-06-05 17:52:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:57,996 INFO L482 AbstractCegarLoop]: Abstraction has 1814 states and 4940 transitions. [2021-06-05 17:52:57,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4940 transitions. [2021-06-05 17:52:57,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:57,998 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:57,998 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:58,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:58,213 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -504897849, now seen corresponding path program 1 times [2021-06-05 17:52:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:58,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927866414] [2021-06-05 17:52:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:58,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927866414] [2021-06-05 17:52:58,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927866414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:58,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:58,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:52:58,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594852688] [2021-06-05 17:52:58,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:52:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:52:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:52:58,326 INFO L87 Difference]: Start difference. First operand 1814 states and 4940 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:58,402 INFO L93 Difference]: Finished difference Result 2566 states and 6814 transitions. [2021-06-05 17:52:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:52:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:58,413 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 17:52:58,413 INFO L226 Difference]: Without dead ends: 2414 [2021-06-05 17:52:58,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:52:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-06-05 17:52:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1902. [2021-06-05 17:52:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1902 states, 1901 states have (on average 2.7064702788006314) internal successors, (5145), 1901 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 5145 transitions. [2021-06-05 17:52:58,456 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 5145 transitions. Word has length 42 [2021-06-05 17:52:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:58,457 INFO L482 AbstractCegarLoop]: Abstraction has 1902 states and 5145 transitions. [2021-06-05 17:52:58,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 5145 transitions. [2021-06-05 17:52:58,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:58,459 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:58,459 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:58,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 17:52:58,459 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:58,460 INFO L82 PathProgramCache]: Analyzing trace with hash -704490053, now seen corresponding path program 2 times [2021-06-05 17:52:58,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:58,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543755680] [2021-06-05 17:52:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:58,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543755680] [2021-06-05 17:52:58,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543755680] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:52:58,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:52:58,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 17:52:58,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102797684] [2021-06-05 17:52:58,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:52:58,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:58,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:52:58,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:52:58,544 INFO L87 Difference]: Start difference. First operand 1902 states and 5145 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:58,656 INFO L93 Difference]: Finished difference Result 2949 states and 7860 transitions. [2021-06-05 17:52:58,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:52:58,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:58,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:58,666 INFO L225 Difference]: With dead ends: 2949 [2021-06-05 17:52:58,666 INFO L226 Difference]: Without dead ends: 2682 [2021-06-05 17:52:58,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:52:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-06-05 17:52:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1884. [2021-06-05 17:52:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1884 states, 1883 states have (on average 2.729155602761551) internal successors, (5139), 1883 states have internal predecessors, (5139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1884 states to 1884 states and 5139 transitions. [2021-06-05 17:52:58,714 INFO L78 Accepts]: Start accepts. Automaton has 1884 states and 5139 transitions. Word has length 42 [2021-06-05 17:52:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:58,714 INFO L482 AbstractCegarLoop]: Abstraction has 1884 states and 5139 transitions. [2021-06-05 17:52:58,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:58,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1884 states and 5139 transitions. [2021-06-05 17:52:58,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:58,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:58,716 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:58,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 17:52:58,717 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:58,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:58,717 INFO L82 PathProgramCache]: Analyzing trace with hash -109178658, now seen corresponding path program 1 times [2021-06-05 17:52:58,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:58,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87593526] [2021-06-05 17:52:58,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87593526] [2021-06-05 17:52:58,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87593526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:58,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838657354] [2021-06-05 17:52:58,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:58,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:52:58,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:52:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:58,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838657354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:58,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:52:58,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:52:58,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186942666] [2021-06-05 17:52:58,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:52:58,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:58,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:52:58,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:52:58,978 INFO L87 Difference]: Start difference. First operand 1884 states and 5139 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:59,083 INFO L93 Difference]: Finished difference Result 3126 states and 8198 transitions. [2021-06-05 17:52:59,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 17:52:59,084 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:59,092 INFO L225 Difference]: With dead ends: 3126 [2021-06-05 17:52:59,092 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 17:52:59,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:52:59,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 17:52:59,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2032. [2021-06-05 17:52:59,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 2.6853766617429837) internal successors, (5454), 2031 states have internal predecessors, (5454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 5454 transitions. [2021-06-05 17:52:59,127 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 5454 transitions. Word has length 42 [2021-06-05 17:52:59,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:59,128 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 5454 transitions. [2021-06-05 17:52:59,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,128 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 5454 transitions. [2021-06-05 17:52:59,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:59,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:59,130 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:59,346 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,347 INFO L82 PathProgramCache]: Analyzing trace with hash 239343274, now seen corresponding path program 2 times [2021-06-05 17:52:59,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462162197] [2021-06-05 17:52:59,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:52:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:52:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:52:59,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462162197] [2021-06-05 17:52:59,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462162197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:59,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500842905] [2021-06-05 17:52:59,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:52:59,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:52:59,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:52:59,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:52:59,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:52:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:52:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500842905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:52:59,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:52:59,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:52:59,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329160563] [2021-06-05 17:52:59,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:52:59,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:52:59,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:52:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:52:59,611 INFO L87 Difference]: Start difference. First operand 2032 states and 5454 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:52:59,727 INFO L93 Difference]: Finished difference Result 3246 states and 8438 transitions. [2021-06-05 17:52:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:52:59,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:52:59,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:52:59,733 INFO L225 Difference]: With dead ends: 3246 [2021-06-05 17:52:59,733 INFO L226 Difference]: Without dead ends: 2766 [2021-06-05 17:52:59,733 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:52:59,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2021-06-05 17:52:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2089. [2021-06-05 17:52:59,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2089 states, 2088 states have (on average 2.692528735632184) internal successors, (5622), 2088 states have internal predecessors, (5622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2089 states to 2089 states and 5622 transitions. [2021-06-05 17:52:59,768 INFO L78 Accepts]: Start accepts. Automaton has 2089 states and 5622 transitions. Word has length 42 [2021-06-05 17:52:59,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:52:59,768 INFO L482 AbstractCegarLoop]: Abstraction has 2089 states and 5622 transitions. [2021-06-05 17:52:59,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:52:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2089 states and 5622 transitions. [2021-06-05 17:52:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 17:52:59,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:52:59,770 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:52:59,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 17:52:59,998 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:52:59,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:52:59,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1660775728, now seen corresponding path program 3 times [2021-06-05 17:52:59,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:52:59,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368446008] [2021-06-05 17:52:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:00,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:00,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368446008] [2021-06-05 17:53:00,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368446008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981176182] [2021-06-05 17:53:00,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:00,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:00,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 17:53:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981176182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:00,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 17:53:00,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349208101] [2021-06-05 17:53:00,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:00,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:00,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:00,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:00,245 INFO L87 Difference]: Start difference. First operand 2089 states and 5622 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:00,423 INFO L93 Difference]: Finished difference Result 3590 states and 9510 transitions. [2021-06-05 17:53:00,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 17:53:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:00,429 INFO L225 Difference]: With dead ends: 3590 [2021-06-05 17:53:00,429 INFO L226 Difference]: Without dead ends: 3056 [2021-06-05 17:53:00,429 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:53:00,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-06-05 17:53:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2263. [2021-06-05 17:53:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.7214854111405837) internal successors, (6156), 2262 states have internal predecessors, (6156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6156 transitions. [2021-06-05 17:53:00,475 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6156 transitions. Word has length 42 [2021-06-05 17:53:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:00,475 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6156 transitions. [2021-06-05 17:53:00,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6156 transitions. [2021-06-05 17:53:00,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:00,495 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:00,495 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:00,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:00,713 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:00,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:00,713 INFO L82 PathProgramCache]: Analyzing trace with hash -965377150, now seen corresponding path program 1 times [2021-06-05 17:53:00,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:00,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184523410] [2021-06-05 17:53:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:00,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184523410] [2021-06-05 17:53:00,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184523410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895897628] [2021-06-05 17:53:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:00,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895897628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:00,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:00,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:00,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113536064] [2021-06-05 17:53:00,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:00,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:00,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:00,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:00,979 INFO L87 Difference]: Start difference. First operand 2263 states and 6156 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:01,104 INFO L93 Difference]: Finished difference Result 3186 states and 8435 transitions. [2021-06-05 17:53:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:53:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:01,108 INFO L225 Difference]: With dead ends: 3186 [2021-06-05 17:53:01,109 INFO L226 Difference]: Without dead ends: 3034 [2021-06-05 17:53:01,109 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 17:53:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-06-05 17:53:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 2351. [2021-06-05 17:53:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2351 states, 2350 states have (on average 2.706808510638298) internal successors, (6361), 2350 states have internal predecessors, (6361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2351 states to 2351 states and 6361 transitions. [2021-06-05 17:53:01,145 INFO L78 Accepts]: Start accepts. Automaton has 2351 states and 6361 transitions. Word has length 47 [2021-06-05 17:53:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:01,145 INFO L482 AbstractCegarLoop]: Abstraction has 2351 states and 6361 transitions. [2021-06-05 17:53:01,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2351 states and 6361 transitions. [2021-06-05 17:53:01,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:01,148 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:01,148 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:01,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 17:53:01,364 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1164969354, now seen corresponding path program 2 times [2021-06-05 17:53:01,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:01,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239794397] [2021-06-05 17:53:01,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:01,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239794397] [2021-06-05 17:53:01,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239794397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536798842] [2021-06-05 17:53:01,422 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:01,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:01,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:01,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536798842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:01,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:01,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 17:53:01,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419429665] [2021-06-05 17:53:01,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:01,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:01,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:01,578 INFO L87 Difference]: Start difference. First operand 2351 states and 6361 transitions. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:01,881 INFO L93 Difference]: Finished difference Result 4460 states and 11788 transitions. [2021-06-05 17:53:01,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 17:53:01,882 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:01,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:01,888 INFO L225 Difference]: With dead ends: 4460 [2021-06-05 17:53:01,888 INFO L226 Difference]: Without dead ends: 3902 [2021-06-05 17:53:01,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 243.7ms TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2021-06-05 17:53:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-06-05 17:53:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 2378. [2021-06-05 17:53:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7328565418594866) internal successors, (6496), 2377 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6496 transitions. [2021-06-05 17:53:01,927 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6496 transitions. Word has length 47 [2021-06-05 17:53:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:01,927 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6496 transitions. [2021-06-05 17:53:01,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6496 transitions. [2021-06-05 17:53:01,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:01,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:01,930 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:02,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:02,145 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:02,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1283832340, now seen corresponding path program 1 times [2021-06-05 17:53:02,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:02,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859929933] [2021-06-05 17:53:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:02,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859929933] [2021-06-05 17:53:02,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859929933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360085777] [2021-06-05 17:53:02,201 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-06-05 17:53:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:02,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360085777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:02,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:02,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968653390] [2021-06-05 17:53:02,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:02,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:02,374 INFO L87 Difference]: Start difference. First operand 2378 states and 6496 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:02,526 INFO L93 Difference]: Finished difference Result 3748 states and 9803 transitions. [2021-06-05 17:53:02,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:02,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:02,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:02,531 INFO L225 Difference]: With dead ends: 3748 [2021-06-05 17:53:02,531 INFO L226 Difference]: Without dead ends: 3356 [2021-06-05 17:53:02,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:53:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-06-05 17:53:02,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2418. [2021-06-05 17:53:02,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7207281754240795) internal successors, (6576), 2417 states have internal predecessors, (6576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6576 transitions. [2021-06-05 17:53:02,571 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6576 transitions. Word has length 47 [2021-06-05 17:53:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:02,571 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6576 transitions. [2021-06-05 17:53:02,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:02,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6576 transitions. [2021-06-05 17:53:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:02,574 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:02,574 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:02,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:02,789 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash -796889656, now seen corresponding path program 2 times [2021-06-05 17:53:02,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:02,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700980189] [2021-06-05 17:53:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:02,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:02,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700980189] [2021-06-05 17:53:02,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700980189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:02,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59813001] [2021-06-05 17:53:02,851 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:02,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:02,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:03,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59813001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:03,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:03,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846268044] [2021-06-05 17:53:03,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:03,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:03,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:03,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:03,026 INFO L87 Difference]: Start difference. First operand 2418 states and 6576 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:03,206 INFO L93 Difference]: Finished difference Result 3948 states and 10203 transitions. [2021-06-05 17:53:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:53:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:03,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:03,212 INFO L225 Difference]: With dead ends: 3948 [2021-06-05 17:53:03,212 INFO L226 Difference]: Without dead ends: 3556 [2021-06-05 17:53:03,212 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:53:03,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-06-05 17:53:03,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 2436. [2021-06-05 17:53:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2436 states, 2435 states have (on average 2.720328542094456) internal successors, (6624), 2435 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 6624 transitions. [2021-06-05 17:53:03,257 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 6624 transitions. Word has length 47 [2021-06-05 17:53:03,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:03,258 INFO L482 AbstractCegarLoop]: Abstraction has 2436 states and 6624 transitions. [2021-06-05 17:53:03,258 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,258 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 6624 transitions. [2021-06-05 17:53:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:03,260 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:03,261 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:03,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 17:53:03,477 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:03,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:03,477 INFO L82 PathProgramCache]: Analyzing trace with hash 519106886, now seen corresponding path program 3 times [2021-06-05 17:53:03,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:03,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788817083] [2021-06-05 17:53:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:03,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:03,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788817083] [2021-06-05 17:53:03,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788817083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375144439] [2021-06-05 17:53:03,549 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:03,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:03,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:03,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:03,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:03,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375144439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:03,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:03,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:03,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818688582] [2021-06-05 17:53:03,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:03,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:03,744 INFO L87 Difference]: Start difference. First operand 2436 states and 6624 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:03,942 INFO L93 Difference]: Finished difference Result 4116 states and 10723 transitions. [2021-06-05 17:53:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:53:03,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:03,947 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 17:53:03,948 INFO L226 Difference]: Without dead ends: 3724 [2021-06-05 17:53:03,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2021-06-05 17:53:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2021-06-05 17:53:03,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 2601. [2021-06-05 17:53:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2601 states, 2600 states have (on average 2.7380769230769233) internal successors, (7119), 2600 states have internal predecessors, (7119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2601 states to 2601 states and 7119 transitions. [2021-06-05 17:53:03,988 INFO L78 Accepts]: Start accepts. Automaton has 2601 states and 7119 transitions. Word has length 47 [2021-06-05 17:53:03,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:03,988 INFO L482 AbstractCegarLoop]: Abstraction has 2601 states and 7119 transitions. [2021-06-05 17:53:03,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2601 states and 7119 transitions. [2021-06-05 17:53:03,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-05 17:53:03,991 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:03,991 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:04,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:04,209 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:04,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:04,209 INFO L82 PathProgramCache]: Analyzing trace with hash 458639374, now seen corresponding path program 4 times [2021-06-05 17:53:04,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:04,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147279905] [2021-06-05 17:53:04,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:04,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:04,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147279905] [2021-06-05 17:53:04,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147279905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896731490] [2021-06-05 17:53:04,264 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:04,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:04,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:04,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:53:04,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:04,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896731490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:04,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:04,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 17:53:04,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750457738] [2021-06-05 17:53:04,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:04,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:04,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:04,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:04,423 INFO L87 Difference]: Start difference. First operand 2601 states and 7119 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:04,846 INFO L93 Difference]: Finished difference Result 5603 states and 14844 transitions. [2021-06-05 17:53:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 17:53:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-06-05 17:53:04,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:04,853 INFO L225 Difference]: With dead ends: 5603 [2021-06-05 17:53:04,853 INFO L226 Difference]: Without dead ends: 4778 [2021-06-05 17:53:04,854 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=316, Invalid=1090, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 17:53:04,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4778 states. [2021-06-05 17:53:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4778 to 2749. [2021-06-05 17:53:04,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2748 states have (on average 2.727802037845706) internal successors, (7496), 2748 states have internal predecessors, (7496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 7496 transitions. [2021-06-05 17:53:04,899 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 7496 transitions. Word has length 47 [2021-06-05 17:53:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:04,899 INFO L482 AbstractCegarLoop]: Abstraction has 2749 states and 7496 transitions. [2021-06-05 17:53:04,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 7496 transitions. [2021-06-05 17:53:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:04,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:04,902 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:05,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:05,120 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:05,120 INFO L82 PathProgramCache]: Analyzing trace with hash 107753584, now seen corresponding path program 2 times [2021-06-05 17:53:05,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:05,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512031454] [2021-06-05 17:53:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:05,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:05,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512031454] [2021-06-05 17:53:05,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512031454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591022914] [2021-06-05 17:53:05,189 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:05,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:05,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:05,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591022914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:05,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:05,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484404983] [2021-06-05 17:53:05,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:05,408 INFO L87 Difference]: Start difference. First operand 2749 states and 7496 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:05,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:05,599 INFO L93 Difference]: Finished difference Result 4577 states and 12242 transitions. [2021-06-05 17:53:05,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 17:53:05,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:05,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:05,605 INFO L225 Difference]: With dead ends: 4577 [2021-06-05 17:53:05,605 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 17:53:05,605 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 209.4ms TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:53:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 17:53:05,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3079. [2021-06-05 17:53:05,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.748213125406108) internal successors, (8459), 3078 states have internal predecessors, (8459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8459 transitions. [2021-06-05 17:53:05,647 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8459 transitions. Word has length 52 [2021-06-05 17:53:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:05,648 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8459 transitions. [2021-06-05 17:53:05,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8459 transitions. [2021-06-05 17:53:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:05,651 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:05,651 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:05,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 17:53:05,867 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash -873948249, now seen corresponding path program 3 times [2021-06-05 17:53:05,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:05,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587317177] [2021-06-05 17:53:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:05,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:05,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587317177] [2021-06-05 17:53:05,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587317177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:05,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165986344] [2021-06-05 17:53:05,937 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:06,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 17:53:06,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 17:53:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:06,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:06,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165986344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:06,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 17:53:06,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624371225] [2021-06-05 17:53:06,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:53:06,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:53:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:53:06,124 INFO L87 Difference]: Start difference. First operand 3079 states and 8459 transitions. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:06,249 INFO L93 Difference]: Finished difference Result 4234 states and 11227 transitions. [2021-06-05 17:53:06,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:06,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:06,254 INFO L225 Difference]: With dead ends: 4234 [2021-06-05 17:53:06,254 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 17:53:06,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 115.5ms TimeCoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 17:53:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3176. [2021-06-05 17:53:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3176 states, 3175 states have (on average 2.733543307086614) internal successors, (8679), 3175 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3176 states to 3176 states and 8679 transitions. [2021-06-05 17:53:06,298 INFO L78 Accepts]: Start accepts. Automaton has 3176 states and 8679 transitions. Word has length 52 [2021-06-05 17:53:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:06,298 INFO L482 AbstractCegarLoop]: Abstraction has 3176 states and 8679 transitions. [2021-06-05 17:53:06,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3176 states and 8679 transitions. [2021-06-05 17:53:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:06,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:06,301 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:06,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 17:53:06,518 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:06,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1073540453, now seen corresponding path program 4 times [2021-06-05 17:53:06,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:06,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211208974] [2021-06-05 17:53:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:06,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:06,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211208974] [2021-06-05 17:53:06,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211208974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432611935] [2021-06-05 17:53:06,575 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:06,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:06,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:06,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:06,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432611935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:06,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:06,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:06,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297528910] [2021-06-05 17:53:06,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:06,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:06,816 INFO L87 Difference]: Start difference. First operand 3176 states and 8679 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:07,154 INFO L93 Difference]: Finished difference Result 5283 states and 14179 transitions. [2021-06-05 17:53:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 17:53:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:07,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:07,159 INFO L225 Difference]: With dead ends: 5283 [2021-06-05 17:53:07,160 INFO L226 Difference]: Without dead ends: 4901 [2021-06-05 17:53:07,160 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-06-05 17:53:07,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2021-06-05 17:53:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 3203. [2021-06-05 17:53:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.740474703310431) internal successors, (8775), 3202 states have internal predecessors, (8775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8775 transitions. [2021-06-05 17:53:07,239 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8775 transitions. Word has length 52 [2021-06-05 17:53:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:07,239 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8775 transitions. [2021-06-05 17:53:07,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8775 transitions. [2021-06-05 17:53:07,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:07,242 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:07,242 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:07,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 17:53:07,449 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:07,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1375261241, now seen corresponding path program 1 times [2021-06-05 17:53:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:07,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974354714] [2021-06-05 17:53:07,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:07,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:07,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974354714] [2021-06-05 17:53:07,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974354714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015024672] [2021-06-05 17:53:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:07,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:07,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015024672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:07,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:07,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:07,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514697778] [2021-06-05 17:53:07,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:07,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:07,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:07,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:07,709 INFO L87 Difference]: Start difference. First operand 3203 states and 8775 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:07,933 INFO L93 Difference]: Finished difference Result 4575 states and 11943 transitions. [2021-06-05 17:53:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:53:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:07,937 INFO L225 Difference]: With dead ends: 4575 [2021-06-05 17:53:07,937 INFO L226 Difference]: Without dead ends: 4423 [2021-06-05 17:53:07,937 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 236.5ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-05 17:53:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2021-06-05 17:53:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 3340. [2021-06-05 17:53:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 2.720275531596286) internal successors, (9083), 3339 states have internal predecessors, (9083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 9083 transitions. [2021-06-05 17:53:07,983 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 9083 transitions. Word has length 52 [2021-06-05 17:53:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:07,983 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 9083 transitions. [2021-06-05 17:53:07,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:07,984 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 9083 transitions. [2021-06-05 17:53:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:07,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:07,986 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:08,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:08,203 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:08,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:08,203 INFO L82 PathProgramCache]: Analyzing trace with hash -705460755, now seen corresponding path program 2 times [2021-06-05 17:53:08,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:08,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187986900] [2021-06-05 17:53:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:08,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:08,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187986900] [2021-06-05 17:53:08,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187986900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945513274] [2021-06-05 17:53:08,264 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:08,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:08,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:08,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:08,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:08,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945513274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:08,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:08,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960690298] [2021-06-05 17:53:08,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:08,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:08,449 INFO L87 Difference]: Start difference. First operand 3340 states and 9083 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:08,793 INFO L93 Difference]: Finished difference Result 5029 states and 13034 transitions. [2021-06-05 17:53:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 17:53:08,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:08,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:08,797 INFO L225 Difference]: With dead ends: 5029 [2021-06-05 17:53:08,797 INFO L226 Difference]: Without dead ends: 4877 [2021-06-05 17:53:08,798 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 303.1ms TimeCoverageRelationStatistics Valid=250, Invalid=806, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:53:08,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-06-05 17:53:08,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 3332. [2021-06-05 17:53:08,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.7469228459921946) internal successors, (9150), 3331 states have internal predecessors, (9150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 9150 transitions. [2021-06-05 17:53:08,857 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 9150 transitions. Word has length 52 [2021-06-05 17:53:08,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:08,857 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 9150 transitions. [2021-06-05 17:53:08,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:08,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 9150 transitions. [2021-06-05 17:53:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:08,860 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:08,860 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:09,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 17:53:09,077 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash 610535787, now seen corresponding path program 3 times [2021-06-05 17:53:09,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:09,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608051819] [2021-06-05 17:53:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:09,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:09,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:09,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608051819] [2021-06-05 17:53:09,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608051819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046207347] [2021-06-05 17:53:09,146 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:09,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:53:09,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:09,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:09,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:09,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046207347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:09,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:09,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 17:53:09,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094732131] [2021-06-05 17:53:09,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:53:09,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:09,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:53:09,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:53:09,363 INFO L87 Difference]: Start difference. First operand 3332 states and 9150 transitions. Second operand has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:09,681 INFO L93 Difference]: Finished difference Result 4945 states and 13174 transitions. [2021-06-05 17:53:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:53:09,682 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:09,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:09,686 INFO L225 Difference]: With dead ends: 4945 [2021-06-05 17:53:09,686 INFO L226 Difference]: Without dead ends: 4793 [2021-06-05 17:53:09,687 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=270, Invalid=852, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 17:53:09,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2021-06-05 17:53:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 3515. [2021-06-05 17:53:09,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 3514 states have (on average 2.7583949914627204) internal successors, (9693), 3514 states have internal predecessors, (9693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 9693 transitions. [2021-06-05 17:53:09,736 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 9693 transitions. Word has length 52 [2021-06-05 17:53:09,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:09,736 INFO L482 AbstractCegarLoop]: Abstraction has 3515 states and 9693 transitions. [2021-06-05 17:53:09,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.588235294117647) internal successors, (95), 17 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:09,737 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 9693 transitions. [2021-06-05 17:53:09,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-06-05 17:53:09,740 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:09,740 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:09,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:09,953 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:09,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:09,953 INFO L82 PathProgramCache]: Analyzing trace with hash 550068275, now seen corresponding path program 4 times [2021-06-05 17:53:09,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:09,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909188784] [2021-06-05 17:53:09,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:10,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:10,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909188784] [2021-06-05 17:53:10,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909188784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548742004] [2021-06-05 17:53:10,021 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:10,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:53:10,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:10,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:53:10,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:10,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548742004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:10,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:10,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 17:53:10,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569649025] [2021-06-05 17:53:10,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 17:53:10,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:10,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 17:53:10,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 17:53:10,218 INFO L87 Difference]: Start difference. First operand 3515 states and 9693 transitions. Second operand has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:10,766 INFO L93 Difference]: Finished difference Result 6692 states and 18060 transitions. [2021-06-05 17:53:10,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 17:53:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-06-05 17:53:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:10,773 INFO L225 Difference]: With dead ends: 6692 [2021-06-05 17:53:10,773 INFO L226 Difference]: Without dead ends: 6131 [2021-06-05 17:53:10,774 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=488, Invalid=1674, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 17:53:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6131 states. [2021-06-05 17:53:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6131 to 3407. [2021-06-05 17:53:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 3406 states have (on average 2.768349970640047) internal successors, (9429), 3406 states have internal predecessors, (9429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 9429 transitions. [2021-06-05 17:53:10,825 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 9429 transitions. Word has length 52 [2021-06-05 17:53:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:10,825 INFO L482 AbstractCegarLoop]: Abstraction has 3407 states and 9429 transitions. [2021-06-05 17:53:10,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.875) internal successors, (94), 16 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:10,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 9429 transitions. [2021-06-05 17:53:10,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:10,828 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:10,828 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:11,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 17:53:11,044 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1774703266, now seen corresponding path program 5 times [2021-06-05 17:53:11,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:11,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522616941] [2021-06-05 17:53:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522616941] [2021-06-05 17:53:11,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522616941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57242199] [2021-06-05 17:53:11,116 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 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 [2021-06-05 17:53:11,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 17:53:11,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:11,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:11,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57242199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:11,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 17:53:11,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122011648] [2021-06-05 17:53:11,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 17:53:11,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:11,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 17:53:11,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 17:53:11,334 INFO L87 Difference]: Start difference. First operand 3407 states and 9429 transitions. Second operand has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:11,461 INFO L93 Difference]: Finished difference Result 4692 states and 12647 transitions. [2021-06-05 17:53:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:53:11,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:11,465 INFO L225 Difference]: With dead ends: 4692 [2021-06-05 17:53:11,465 INFO L226 Difference]: Without dead ends: 4540 [2021-06-05 17:53:11,466 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-06-05 17:53:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4540 states. [2021-06-05 17:53:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4540 to 3535. [2021-06-05 17:53:11,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 3534 states have (on average 2.7637238256932655) internal successors, (9767), 3534 states have internal predecessors, (9767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 9767 transitions. [2021-06-05 17:53:11,506 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 9767 transitions. Word has length 57 [2021-06-05 17:53:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:11,506 INFO L482 AbstractCegarLoop]: Abstraction has 3535 states and 9767 transitions. [2021-06-05 17:53:11,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.777777777777778) internal successors, (104), 18 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 9767 transitions. [2021-06-05 17:53:11,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:11,510 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:11,510 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:11,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 17:53:11,710 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1575111062, now seen corresponding path program 6 times [2021-06-05 17:53:11,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:11,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486509395] [2021-06-05 17:53:11,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:11,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486509395] [2021-06-05 17:53:11,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486509395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469708866] [2021-06-05 17:53:11,788 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 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 [2021-06-05 17:53:11,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 17:53:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:11,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:53:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469708866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:11,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:11,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-05 17:53:11,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538292602] [2021-06-05 17:53:11,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:53:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:53:11,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:53:11,979 INFO L87 Difference]: Start difference. First operand 3535 states and 9767 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:12,299 INFO L93 Difference]: Finished difference Result 6861 states and 18375 transitions. [2021-06-05 17:53:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:53:12,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:12,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:12,305 INFO L225 Difference]: With dead ends: 6861 [2021-06-05 17:53:12,305 INFO L226 Difference]: Without dead ends: 6303 [2021-06-05 17:53:12,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=227, Invalid=829, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 17:53:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6303 states. [2021-06-05 17:53:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6303 to 3424. [2021-06-05 17:53:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 2.7788489628980426) internal successors, (9512), 3423 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 9512 transitions. [2021-06-05 17:53:12,356 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 9512 transitions. Word has length 57 [2021-06-05 17:53:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:12,357 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 9512 transitions. [2021-06-05 17:53:12,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 9512 transitions. [2021-06-05 17:53:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:12,360 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:12,360 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:12,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 17:53:12,567 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:12,568 INFO L82 PathProgramCache]: Analyzing trace with hash -271054540, now seen corresponding path program 5 times [2021-06-05 17:53:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:12,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559339369] [2021-06-05 17:53:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:12,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:12,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559339369] [2021-06-05 17:53:12,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559339369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:12,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726005653] [2021-06-05 17:53:12,642 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 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 [2021-06-05 17:53:12,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:53:12,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:12,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:12,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:12,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726005653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:12,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:12,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:12,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564216431] [2021-06-05 17:53:12,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:12,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:12,927 INFO L87 Difference]: Start difference. First operand 3424 states and 9512 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:13,279 INFO L93 Difference]: Finished difference Result 5340 states and 14012 transitions. [2021-06-05 17:53:13,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 17:53:13,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:13,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:13,284 INFO L225 Difference]: With dead ends: 5340 [2021-06-05 17:53:13,284 INFO L226 Difference]: Without dead ends: 4948 [2021-06-05 17:53:13,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 359.5ms TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 17:53:13,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2021-06-05 17:53:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 3552. [2021-06-05 17:53:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 2.758941143339904) internal successors, (9797), 3551 states have internal predecessors, (9797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 9797 transitions. [2021-06-05 17:53:13,343 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 9797 transitions. Word has length 57 [2021-06-05 17:53:13,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:13,343 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 9797 transitions. [2021-06-05 17:53:13,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:13,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 9797 transitions. [2021-06-05 17:53:13,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:13,347 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:13,347 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:13,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 17:53:13,565 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1943190760, now seen corresponding path program 6 times [2021-06-05 17:53:13,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:13,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771682666] [2021-06-05 17:53:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:13,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:13,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771682666] [2021-06-05 17:53:13,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771682666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740591415] [2021-06-05 17:53:13,633 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 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 [2021-06-05 17:53:13,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:53:13,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:13,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:13,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740591415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:13,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:13,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:13,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581885433] [2021-06-05 17:53:13,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:13,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:13,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:13,882 INFO L87 Difference]: Start difference. First operand 3552 states and 9797 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:14,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:14,270 INFO L93 Difference]: Finished difference Result 5417 states and 14247 transitions. [2021-06-05 17:53:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 17:53:14,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:14,275 INFO L225 Difference]: With dead ends: 5417 [2021-06-05 17:53:14,275 INFO L226 Difference]: Without dead ends: 5265 [2021-06-05 17:53:14,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=295, Invalid=1037, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 17:53:14,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5265 states. [2021-06-05 17:53:14,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5265 to 3672. [2021-06-05 17:53:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3672 states, 3671 states have (on average 2.7709071097793516) internal successors, (10172), 3671 states have internal predecessors, (10172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:14,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3672 states to 3672 states and 10172 transitions. [2021-06-05 17:53:14,321 INFO L78 Accepts]: Start accepts. Automaton has 3672 states and 10172 transitions. Word has length 57 [2021-06-05 17:53:14,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:14,321 INFO L482 AbstractCegarLoop]: Abstraction has 3672 states and 10172 transitions. [2021-06-05 17:53:14,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:14,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3672 states and 10172 transitions. [2021-06-05 17:53:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:14,325 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:14,325 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:14,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:14,541 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:14,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:14,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1035779994, now seen corresponding path program 7 times [2021-06-05 17:53:14,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:14,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499064436] [2021-06-05 17:53:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:14,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:14,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499064436] [2021-06-05 17:53:14,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499064436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395255281] [2021-06-05 17:53:14,618 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 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 [2021-06-05 17:53:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:14,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:14,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:53:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:14,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395255281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:14,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:53:14,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 17:53:14,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745304614] [2021-06-05 17:53:14,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:53:14,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:53:14,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:53:14,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:53:14,883 INFO L87 Difference]: Start difference. First operand 3672 states and 10172 transitions. Second operand has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:53:15,371 INFO L93 Difference]: Finished difference Result 6477 states and 17215 transitions. [2021-06-05 17:53:15,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 17:53:15,371 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-06-05 17:53:15,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:53:15,377 INFO L225 Difference]: With dead ends: 6477 [2021-06-05 17:53:15,377 INFO L226 Difference]: Without dead ends: 6085 [2021-06-05 17:53:15,378 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=377, Invalid=1429, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 17:53:15,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-06-05 17:53:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 3980. [2021-06-05 17:53:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3980 states, 3979 states have (on average 2.80120633324956) internal successors, (11146), 3979 states have internal predecessors, (11146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3980 states to 3980 states and 11146 transitions. [2021-06-05 17:53:15,431 INFO L78 Accepts]: Start accepts. Automaton has 3980 states and 11146 transitions. Word has length 57 [2021-06-05 17:53:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:53:15,431 INFO L482 AbstractCegarLoop]: Abstraction has 3980 states and 11146 transitions. [2021-06-05 17:53:15,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.526315789473684) internal successors, (105), 19 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:53:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3980 states and 11146 transitions. [2021-06-05 17:53:15,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-06-05 17:53:15,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 17:53:15,436 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:53:15,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:53:15,651 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 17:53:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:53:15,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1096247506, now seen corresponding path program 8 times [2021-06-05 17:53:15,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:53:15,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716490408] [2021-06-05 17:53:15,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:53:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:53:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:53:15,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:53:15,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716490408] [2021-06-05 17:53:15,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716490408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:53:15,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769766584] [2021-06-05 17:53:15,726 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 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 [2021-06-05 17:53:15,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:53:15,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:53:15,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:53:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2021-06-05 18:07:38,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 18:07:38,530 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 18:07:38,531 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:07:38,532 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 18:07:38,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:07:38 BasicIcfg [2021-06-05 18:07:38,533 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:07:38,533 INFO L168 Benchmark]: Toolchain (without parser) took 883684.97 ms. Allocated memory was 377.5 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 340.0 MB in the beginning and 915.5 MB in the end (delta: -575.4 MB). Peak memory consumption was 882.5 MB. Max. memory is 16.0 GB. [2021-06-05 18:07:38,533 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 377.5 MB. Free memory was 357.8 MB in the beginning and 357.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:07:38,533 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.58 ms. Allocated memory is still 377.5 MB. Free memory was 339.8 MB in the beginning and 341.2 MB in the end (delta: -1.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.0 GB. [2021-06-05 18:07:38,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.88 ms. Allocated memory is still 377.5 MB. Free memory was 341.2 MB in the beginning and 339.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:07:38,533 INFO L168 Benchmark]: Boogie Preprocessor took 13.64 ms. Allocated memory is still 377.5 MB. Free memory was 339.1 MB in the beginning and 338.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:07:38,533 INFO L168 Benchmark]: RCFGBuilder took 696.12 ms. Allocated memory is still 377.5 MB. Free memory was 338.1 MB in the beginning and 315.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:07:38,533 INFO L168 Benchmark]: TraceAbstraction took 882601.52 ms. Allocated memory was 377.5 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 314.0 MB in the beginning and 915.5 MB in the end (delta: -601.5 MB). Peak memory consumption was 856.6 MB. Max. memory is 16.0 GB. [2021-06-05 18:07:38,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 377.5 MB. Free memory was 357.8 MB in the beginning and 357.8 MB in the end (delta: 65.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 345.58 ms. Allocated memory is still 377.5 MB. Free memory was 339.8 MB in the beginning and 341.2 MB in the end (delta: -1.4 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 22.88 ms. Allocated memory is still 377.5 MB. Free memory was 341.2 MB in the beginning and 339.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.64 ms. Allocated memory is still 377.5 MB. Free memory was 339.1 MB in the beginning and 338.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 696.12 ms. Allocated memory is still 377.5 MB. Free memory was 338.1 MB in the beginning and 315.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 882601.52 ms. Allocated memory was 377.5 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 314.0 MB in the beginning and 915.5 MB in the end (delta: -601.5 MB). Peak memory consumption was 856.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 730]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was analyzing trace of length 58 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while ExplicitLhsPolynomialRelations was build 0 of 1 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 882520.7ms, OverallIterations: 29, TraceHistogramMax: 4, EmptinessCheckTime: 84.6ms, AutomataDifference: 6611.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 76.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2637 SDtfs, 13852 SDslu, 19193 SDs, 0 SdLazy, 3201 SolverSat, 823 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1584.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1653 GetRequests, 998 SyntacticMatches, 3 SemanticMatches, 652 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4550 ImplicationChecksByTransitivity, 5769.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3980occurred in iteration=28, InterpolantAutomatonStates: 589, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1262.6ms AutomataMinimizationTime, 28 MinimizatonAttempts, 32501 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 266.9ms SsaConstructionTime, 512.9ms SatisfiabilityAnalysisTime, 5073.3ms InterpolantComputationTime, 2425 NumberOfCodeBlocks, 2425 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 2375 ConstructedInterpolants, 0 QuantifiedInterpolants, 16995 SizeOfPredicates, 44 NumberOfNonLiveVariables, 2817 ConjunctsInSsa, 239 ConjunctsInUnsatCore, 50 InterpolantComputations, 6 PerfectInterpolantSequences, 0/300 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown