/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/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-05 18:17:27,487 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 18:17:27,489 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 18:17:27,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-05 18:17:27,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-05 18:17:27,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-05 18:17:27,525 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-05 18:17:27,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-05 18:17:27,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-05 18:17:27,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-05 18:17:27,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-05 18:17:27,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-05 18:17:27,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 18:17:27,540 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 18:17:27,541 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 18:17:27,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 18:17:27,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 18:17:27,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 18:17:27,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 18:17:27,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 18:17:27,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 18:17:27,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 18:17:27,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 18:17:27,562 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 18:17:27,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 18:17:27,599 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 18:17:27,600 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 18:17:27,600 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 18:17:27,604 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 18:17:27,633 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 18:17:27,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 18:17:27,634 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 18:17:27,634 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 18:17:27,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 18:17:27,635 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 18:17:27,635 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 18:17:27,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 18:17:27,635 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 18:17:27,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 18:17:27,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 18:17:27,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 18:17:27,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 18:17:27,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 18:17:27,636 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 18:17:27,636 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 18:17:27,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 18:17:27,636 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 18:17:27,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 18:17:27,636 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 18:17:27,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 18:17:27,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 18:17:27,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 18:17:27,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 18:17:27,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 18:17:27,637 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 18:17:27,637 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 18:17:27,637 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 18:17:27,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 18:17:27,638 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 18:17:27,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 18:17:27,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 18:17:27,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 18:17:27,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 18:17:27,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 18:17:27,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-06-05 18:17:27,980 INFO L275 PluginConnector]: CDTParser initialized [2021-06-05 18:17:27,981 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-06-05 18:17:28,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db13b9e52/44e8df4ccca547f09dbe914ed9211ead/FLAG33aecbdc5 [2021-06-05 18:17:28,566 INFO L306 CDTParser]: Found 1 translation units. [2021-06-05 18:17:28,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-06-05 18:17:28,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db13b9e52/44e8df4ccca547f09dbe914ed9211ead/FLAG33aecbdc5 [2021-06-05 18:17:29,053 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db13b9e52/44e8df4ccca547f09dbe914ed9211ead [2021-06-05 18:17:29,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 18:17:29,057 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-06-05 18:17:29,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-06-05 18:17:29,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-06-05 18:17:29,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-06-05 18:17:29,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed27504 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29, skipping insertion in model container [2021-06-05 18:17:29,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-06-05 18:17:29,111 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-06-05 18:17:29,439 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/triangular-longer-2.i[30963,30976] [2021-06-05 18:17:29,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:17:29,448 INFO L203 MainTranslator]: Completed pre-run [2021-06-05 18:17:29,477 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/triangular-longer-2.i[30963,30976] [2021-06-05 18:17:29,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-06-05 18:17:29,535 INFO L208 MainTranslator]: Completed translation [2021-06-05 18:17:29,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29 WrapperNode [2021-06-05 18:17:29,535 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-06-05 18:17:29,536 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 18:17:29,536 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 18:17:29,536 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 18:17:29,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 18:17:29,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 18:17:29,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 18:17:29,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 18:17:29,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (1/1) ... [2021-06-05 18:17:29,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 18:17:29,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 18:17:29,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 18:17:29,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 18:17:29,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (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 18:17:29,654 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-06-05 18:17:29,655 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-06-05 18:17:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-06-05 18:17:29,655 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-06-05 18:17:29,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-06-05 18:17:29,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-06-05 18:17:29,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-06-05 18:17:29,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-06-05 18:17:29,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-06-05 18:17:29,658 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-06-05 18:17:29,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 18:17:29,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 18:17:29,659 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 18:17:30,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 18:17:30,008 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-06-05 18:17:30,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:17:30 BoogieIcfgContainer [2021-06-05 18:17:30,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 18:17:30,011 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 18:17:30,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 18:17:30,017 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 18:17:30,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.06 06:17:29" (1/3) ... [2021-06-05 18:17:30,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4290ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:17:30, skipping insertion in model container [2021-06-05 18:17:30,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.06 06:17:29" (2/3) ... [2021-06-05 18:17:30,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e4290ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 06:17:30, skipping insertion in model container [2021-06-05 18:17:30,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 06:17:30" (3/3) ... [2021-06-05 18:17:30,020 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-06-05 18:17:30,024 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 18:17:30,025 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 18:17:30,025 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 18:17:30,029 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 18:17:30,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,049 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,049 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,050 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,051 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,051 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,052 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,052 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,052 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,053 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,053 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,053 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,053 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,053 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,054 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,054 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,054 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,054 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,055 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,055 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,056 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,057 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,057 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,057 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,057 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,058 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,058 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,058 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,059 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,059 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,061 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,062 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,062 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,062 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,062 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,062 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,066 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,067 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,067 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 18:17:30,069 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 18:17:30,087 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 18:17:30,103 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 18:17:30,103 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 18:17:30,103 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 18:17:30,104 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 18:17:30,104 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 18:17:30,104 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 18:17:30,104 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 18:17:30,104 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-05 18:17:30,113 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-06-05 18:17:30,193 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 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 18:17:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 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 18:17:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 18:17:30,208 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:30,209 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 18:17:30,209 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:30,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:30,214 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-06-05 18:17:30,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:30,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196969824] [2021-06-05 18:17:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:30,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:30,522 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 18:17:30,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:30,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196969824] [2021-06-05 18:17:30,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196969824] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:30,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:30,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:17:30,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274969826] [2021-06-05 18:17:30,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:17:30,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:30,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:17:30,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:17:30,553 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 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 18:17:30,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:30,817 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-06-05 18:17:30,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 18:17:30,818 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 18:17:30,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:30,844 INFO L225 Difference]: With dead ends: 3467 [2021-06-05 18:17:30,844 INFO L226 Difference]: Without dead ends: 1242 [2021-06-05 18:17:30,845 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-06-05 18:17:31,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-06-05 18:17:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 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 18:17:31,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-06-05 18:17:31,033 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-06-05 18:17:31,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:31,033 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-06-05 18:17:31,034 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 18:17:31,034 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-06-05 18:17:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 18:17:31,042 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:31,042 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] [2021-06-05 18:17:31,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 18:17:31,042 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,049 INFO L82 PathProgramCache]: Analyzing trace with hash -2094315683, now seen corresponding path program 1 times [2021-06-05 18:17:31,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703624361] [2021-06-05 18:17:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,228 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 18:17:31,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:31,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703624361] [2021-06-05 18:17:31,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703624361] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:31,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:31,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:17:31,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352746859] [2021-06-05 18:17:31,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:17:31,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:17:31,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:17:31,234 INFO L87 Difference]: Start difference. First operand 942 states and 2548 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:17:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:31,403 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-06-05 18:17:31,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 18:17:31,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-06-05 18:17:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:31,415 INFO L225 Difference]: With dead ends: 1194 [2021-06-05 18:17:31,415 INFO L226 Difference]: Without dead ends: 942 [2021-06-05 18:17:31,416 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-06-05 18:17:31,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-06-05 18:17:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 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 18:17:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-06-05 18:17:31,463 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-06-05 18:17:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:31,465 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-06-05 18:17:31,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:17:31,465 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-06-05 18:17:31,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 18:17:31,466 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:31,467 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] [2021-06-05 18:17:31,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 18:17:31,467 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-06-05 18:17:31,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606667679] [2021-06-05 18:17:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,615 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 18:17:31,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:31,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606667679] [2021-06-05 18:17:31,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606667679] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:31,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:31,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 18:17:31,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139297161] [2021-06-05 18:17:31,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 18:17:31,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 18:17:31,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 18:17:31,617 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:17:31,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:31,720 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-06-05 18:17:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 18:17:31,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-06-05 18:17:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:31,726 INFO L225 Difference]: With dead ends: 1302 [2021-06-05 18:17:31,726 INFO L226 Difference]: Without dead ends: 920 [2021-06-05 18:17:31,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:31,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-06-05 18:17:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-06-05 18:17:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 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 18:17:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-06-05 18:17:31,748 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-06-05 18:17:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:31,749 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-06-05 18:17:31,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 18:17:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-06-05 18:17:31,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:31,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:31,752 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] [2021-06-05 18:17:31,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 18:17:31,752 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:31,753 INFO L82 PathProgramCache]: Analyzing trace with hash 93608864, now seen corresponding path program 1 times [2021-06-05 18:17:31,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:31,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993839051] [2021-06-05 18:17:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:31,875 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 18:17:31,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:31,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993839051] [2021-06-05 18:17:31,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993839051] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:31,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:31,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:17:31,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138677649] [2021-06-05 18:17:31,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:17:31,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:31,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:17:31,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:17:31,877 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:32,052 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-06-05 18:17:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 18:17:32,056 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-06-05 18:17:32,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:32,061 INFO L225 Difference]: With dead ends: 1304 [2021-06-05 18:17:32,061 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 18:17:32,065 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 136.2ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 18:17:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-06-05 18:17:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 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 18:17:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-06-05 18:17:32,086 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-06-05 18:17:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:32,088 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-06-05 18:17:32,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,088 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-06-05 18:17:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:32,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:32,089 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] [2021-06-05 18:17:32,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 18:17:32,090 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:32,090 INFO L82 PathProgramCache]: Analyzing trace with hash -466628886, now seen corresponding path program 2 times [2021-06-05 18:17:32,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:32,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477366167] [2021-06-05 18:17:32,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:32,201 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 18:17:32,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:32,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477366167] [2021-06-05 18:17:32,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477366167] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:32,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:32,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 18:17:32,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6208552] [2021-06-05 18:17:32,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 18:17:32,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 18:17:32,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 18:17:32,202 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:32,329 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-06-05 18:17:32,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:17:32,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-06-05 18:17:32,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:32,336 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 18:17:32,336 INFO L226 Difference]: Without dead ends: 1505 [2021-06-05 18:17:32,337 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-06-05 18:17:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-06-05 18:17:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 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 18:17:32,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-06-05 18:17:32,363 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-06-05 18:17:32,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:32,363 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-06-05 18:17:32,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,364 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-06-05 18:17:32,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:32,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:32,365 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] [2021-06-05 18:17:32,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 18:17:32,365 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:32,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:32,365 INFO L82 PathProgramCache]: Analyzing trace with hash -78750066, now seen corresponding path program 3 times [2021-06-05 18:17:32,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:32,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696331689] [2021-06-05 18:17:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:32,467 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 18:17:32,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:32,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696331689] [2021-06-05 18:17:32,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696331689] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:32,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:32,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:17:32,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298658310] [2021-06-05 18:17:32,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:17:32,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:17:32,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:17:32,469 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:32,582 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-06-05 18:17:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:17:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-06-05 18:17:32,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:32,593 INFO L225 Difference]: With dead ends: 2211 [2021-06-05 18:17:32,593 INFO L226 Difference]: Without dead ends: 1944 [2021-06-05 18:17:32,596 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:32,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-06-05 18:17:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-06-05 18:17:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 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 18:17:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-06-05 18:17:32,661 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-06-05 18:17:32,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:32,661 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-06-05 18:17:32,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-06-05 18:17:32,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 18:17:32,666 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:32,666 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] [2021-06-05 18:17:32,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 18:17:32,666 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:32,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:32,667 INFO L82 PathProgramCache]: Analyzing trace with hash -56406816, now seen corresponding path program 4 times [2021-06-05 18:17:32,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:32,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486536922] [2021-06-05 18:17:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:32,730 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 18:17:32,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:32,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486536922] [2021-06-05 18:17:32,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486536922] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 18:17:32,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 18:17:32,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-05 18:17:32,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694173314] [2021-06-05 18:17:32,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 18:17:32,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 18:17:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 18:17:32,732 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:32,861 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-06-05 18:17:32,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 18:17:32,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-06-05 18:17:32,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:32,867 INFO L225 Difference]: With dead ends: 1519 [2021-06-05 18:17:32,867 INFO L226 Difference]: Without dead ends: 1138 [2021-06-05 18:17:32,867 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:32,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-06-05 18:17:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-06-05 18:17:32,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 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 18:17:32,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-06-05 18:17:32,892 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-06-05 18:17:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:32,893 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-06-05 18:17:32,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 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 18:17:32,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-06-05 18:17:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:17:32,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:32,894 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] [2021-06-05 18:17:32,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 18:17:32,894 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:32,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:32,895 INFO L82 PathProgramCache]: Analyzing trace with hash -709715269, now seen corresponding path program 1 times [2021-06-05 18:17:32,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:32,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724922094] [2021-06-05 18:17:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:32,975 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 18:17:32,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724922094] [2021-06-05 18:17:32,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724922094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087946823] [2021-06-05 18:17:32,976 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 18:17:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:33,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:17:33,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:33,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087946823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:33,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:33,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:17:33,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527500848] [2021-06-05 18:17:33,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:33,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:33,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:33,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:33,249 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 18:17:33,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:33,404 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-06-05 18:17:33,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 18:17:33,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 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 45 [2021-06-05 18:17:33,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:33,409 INFO L225 Difference]: With dead ends: 1451 [2021-06-05 18:17:33,410 INFO L226 Difference]: Without dead ends: 1181 [2021-06-05 18:17:33,410 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 134.7ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-06-05 18:17:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-06-05 18:17:33,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 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 18:17:33,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-06-05 18:17:33,436 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-06-05 18:17:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:33,436 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-06-05 18:17:33,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 18:17:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-06-05 18:17:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:17:33,438 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:33,438 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] [2021-06-05 18:17:33,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 18:17:33,654 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:33,654 INFO L82 PathProgramCache]: Analyzing trace with hash -321836449, now seen corresponding path program 2 times [2021-06-05 18:17:33,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:33,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308677884] [2021-06-05 18:17:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:33,736 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 18:17:33,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:33,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308677884] [2021-06-05 18:17:33,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308677884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:33,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801382479] [2021-06-05 18:17:33,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:33,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:33,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:33,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:33,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:33,955 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 18:17:33,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801382479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:33,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:33,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 18:17:33,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656086481] [2021-06-05 18:17:33,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:17:33,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:33,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:17:33,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:33,957 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 18:17:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:34,128 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-06-05 18:17:34,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:17:34,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 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 45 [2021-06-05 18:17:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:34,138 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 18:17:34,138 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 18:17:34,138 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:17:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 18:17:34,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-06-05 18:17:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 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 18:17:34,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-06-05 18:17:34,182 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-06-05 18:17:34,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:34,182 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-06-05 18:17:34,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 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 18:17:34,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-06-05 18:17:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:17:34,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:34,184 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] [2021-06-05 18:17:34,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:34,407 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:34,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:34,408 INFO L82 PathProgramCache]: Analyzing trace with hash -299493199, now seen corresponding path program 3 times [2021-06-05 18:17:34,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:34,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726210950] [2021-06-05 18:17:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:34,477 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 18:17:34,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726210950] [2021-06-05 18:17:34,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726210950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:34,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907633689] [2021-06-05 18:17:34,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:34,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 18:17:34,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:34,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:34,671 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 18:17:34,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907633689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:34,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:34,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:17:34,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255520065] [2021-06-05 18:17:34,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:34,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:34,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:34,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:34,673 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 18:17:34,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:34,953 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-06-05 18:17:34,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:34,954 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 45 [2021-06-05 18:17:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:34,960 INFO L225 Difference]: With dead ends: 2121 [2021-06-05 18:17:34,961 INFO L226 Difference]: Without dead ends: 1546 [2021-06-05 18:17:34,961 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:17:34,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-06-05 18:17:34,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-06-05 18:17:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 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 18:17:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-06-05 18:17:34,994 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-06-05 18:17:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:34,994 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-06-05 18:17:34,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 18:17:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-06-05 18:17:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 18:17:34,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:34,996 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] [2021-06-05 18:17:35,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 18:17:35,210 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1574579510, now seen corresponding path program 1 times [2021-06-05 18:17:35,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:35,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158398113] [2021-06-05 18:17:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:35,268 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 18:17:35,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:35,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158398113] [2021-06-05 18:17:35,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158398113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:35,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638254844] [2021-06-05 18:17:35,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:35,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 18:17:35,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:35,463 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 18:17:35,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638254844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:35,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:35,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 18:17:35,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563898844] [2021-06-05 18:17:35,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:35,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:35,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:35,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:35,465 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 18:17:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:35,641 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-06-05 18:17:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:17:35,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 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 45 [2021-06-05 18:17:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:35,649 INFO L225 Difference]: With dead ends: 2398 [2021-06-05 18:17:35,650 INFO L226 Difference]: Without dead ends: 1926 [2021-06-05 18:17:35,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:17:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-06-05 18:17:35,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-06-05 18:17:35,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 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 18:17:35,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-06-05 18:17:35,697 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-06-05 18:17:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:35,697 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-06-05 18:17:35,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 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 18:17:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-06-05 18:17:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:35,702 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:35,702 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] [2021-06-05 18:17:35,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:35,917 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:35,917 INFO L82 PathProgramCache]: Analyzing trace with hash -767959508, now seen corresponding path program 1 times [2021-06-05 18:17:35,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:35,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194274789] [2021-06-05 18:17:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:36,019 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 18:17:36,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194274789] [2021-06-05 18:17:36,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194274789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576468305] [2021-06-05 18:17:36,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:17:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:36,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:36,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:36,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576468305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:36,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:17:36,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432648105] [2021-06-05 18:17:36,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:17:36,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:36,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:17:36,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:17:36,232 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:17:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:36,433 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-06-05 18:17:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:17:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:36,454 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 18:17:36,454 INFO L226 Difference]: Without dead ends: 1596 [2021-06-05 18:17:36,455 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:17:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-06-05 18:17:36,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-06-05 18:17:36,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 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 18:17:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 18:17:36,491 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 18:17:36,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:36,491 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 18:17:36,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.818181818181818) internal successors, (64), 11 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 18:17:36,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 18:17:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:36,494 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:36,494 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] [2021-06-05 18:17:36,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 18:17:36,713 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1043607760, now seen corresponding path program 2 times [2021-06-05 18:17:36,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:36,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998648220] [2021-06-05 18:17:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:36,796 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 18:17:36,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:36,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998648220] [2021-06-05 18:17:36,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998648220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141600893] [2021-06-05 18:17:36,797 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 18:17:36,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:36,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:36,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:36,972 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 18:17:36,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141600893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:36,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:36,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 18:17:36,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145086471] [2021-06-05 18:17:36,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:36,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:36,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:36,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:36,973 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:37,153 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-06-05 18:17:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:17:37,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:37,158 INFO L225 Difference]: With dead ends: 1981 [2021-06-05 18:17:37,158 INFO L226 Difference]: Without dead ends: 1711 [2021-06-05 18:17:37,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:17:37,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-06-05 18:17:37,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-06-05 18:17:37,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 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 18:17:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-06-05 18:17:37,223 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-06-05 18:17:37,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:37,223 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-06-05 18:17:37,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-06-05 18:17:37,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:37,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:37,226 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] [2021-06-05 18:17:37,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:37,449 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:37,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:37,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1473361344, now seen corresponding path program 3 times [2021-06-05 18:17:37,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:37,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163261946] [2021-06-05 18:17:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:37,539 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 18:17:37,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:37,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163261946] [2021-06-05 18:17:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163261946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:37,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096850834] [2021-06-05 18:17:37,540 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 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 18:17:37,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:17:37,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:37,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:37,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:37,713 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 18:17:37,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096850834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:37,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:37,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 18:17:37,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784989267] [2021-06-05 18:17:37,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 18:17:37,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:37,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 18:17:37,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 18:17:37,714 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:17:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:38,002 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-06-05 18:17:38,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:38,002 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:38,006 INFO L225 Difference]: With dead ends: 2669 [2021-06-05 18:17:38,007 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 18:17:38,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 18:17:38,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-06-05 18:17:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 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 18:17:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-06-05 18:17:38,037 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-06-05 18:17:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:38,037 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-06-05 18:17:38,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:17:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-06-05 18:17:38,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:38,040 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:38,040 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] [2021-06-05 18:17:38,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 18:17:38,253 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:38,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1415627214, now seen corresponding path program 4 times [2021-06-05 18:17:38,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:38,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994073370] [2021-06-05 18:17:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:38,334 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 18:17:38,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:38,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994073370] [2021-06-05 18:17:38,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994073370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:38,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450407883] [2021-06-05 18:17:38,334 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 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 18:17:38,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:38,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:38,526 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 18:17:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450407883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:38,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:38,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 18:17:38,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713084081] [2021-06-05 18:17:38,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:38,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:38,529 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:38,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:38,743 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-06-05 18:17:38,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:38,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:38,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:38,749 INFO L225 Difference]: With dead ends: 2878 [2021-06-05 18:17:38,749 INFO L226 Difference]: Without dead ends: 2608 [2021-06-05 18:17:38,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:17:38,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-06-05 18:17:38,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-06-05 18:17:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 states have internal predecessors, (4803), 0 states have call successors, (0), 0 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 18:17:38,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-06-05 18:17:38,806 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-06-05 18:17:38,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:38,806 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-06-05 18:17:38,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:38,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-06-05 18:17:38,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:38,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:38,810 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] [2021-06-05 18:17:39,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 18:17:39,033 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:39,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:39,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1437970464, now seen corresponding path program 5 times [2021-06-05 18:17:39,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:39,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697930897] [2021-06-05 18:17:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:39,116 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 18:17:39,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:39,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697930897] [2021-06-05 18:17:39,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697930897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:39,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040581458] [2021-06-05 18:17:39,117 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 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 18:17:39,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 18:17:39,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:39,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:39,295 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 18:17:39,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040581458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:39,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:39,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:17:39,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973272444] [2021-06-05 18:17:39,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:39,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:39,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:39,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:39,297 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:17:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:39,613 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-06-05 18:17:39,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:39,618 INFO L225 Difference]: With dead ends: 2821 [2021-06-05 18:17:39,619 INFO L226 Difference]: Without dead ends: 2246 [2021-06-05 18:17:39,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-06-05 18:17:39,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-06-05 18:17:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-06-05 18:17:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 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 18:17:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-06-05 18:17:39,658 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-06-05 18:17:39,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:39,658 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-06-05 18:17:39,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:17:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-06-05 18:17:39,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:39,661 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:39,661 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] [2021-06-05 18:17:39,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 18:17:39,885 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:39,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:39,886 INFO L82 PathProgramCache]: Analyzing trace with hash 978716506, now seen corresponding path program 6 times [2021-06-05 18:17:39,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:39,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147873676] [2021-06-05 18:17:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:39,978 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:39,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:39,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147873676] [2021-06-05 18:17:39,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147873676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:39,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680630756] [2021-06-05 18:17:39,979 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 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 18:17:40,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 18:17:40,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:40,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:40,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:40,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680630756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:40,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:40,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:17:40,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992421167] [2021-06-05 18:17:40,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:40,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:40,177 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:17:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:40,367 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-06-05 18:17:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:17:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:40,372 INFO L225 Difference]: With dead ends: 2561 [2021-06-05 18:17:40,372 INFO L226 Difference]: Without dead ends: 2212 [2021-06-05 18:17:40,372 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:17:40,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-06-05 18:17:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-06-05 18:17:40,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 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 18:17:40,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-06-05 18:17:40,412 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-06-05 18:17:40,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:40,412 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-06-05 18:17:40,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:17:40,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-06-05 18:17:40,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:40,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:40,415 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] [2021-06-05 18:17:40,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 18:17:40,629 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1071233846, now seen corresponding path program 7 times [2021-06-05 18:17:40,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:40,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795589380] [2021-06-05 18:17:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:40,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795589380] [2021-06-05 18:17:40,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795589380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:40,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022854724] [2021-06-05 18:17:40,701 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 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 18:17:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:40,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:40,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022854724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:40,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:40,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:17:40,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196064516] [2021-06-05 18:17:40,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:17:40,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:40,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:17:40,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:40,886 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:41,008 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-06-05 18:17:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 18:17:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:41,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:41,012 INFO L225 Difference]: With dead ends: 2311 [2021-06-05 18:17:41,012 INFO L226 Difference]: Without dead ends: 2026 [2021-06-05 18:17:41,013 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 98.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:17:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-06-05 18:17:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-06-05 18:17:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 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 18:17:41,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-06-05 18:17:41,048 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-06-05 18:17:41,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:41,048 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-06-05 18:17:41,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:41,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-06-05 18:17:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:41,051 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:41,051 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] [2021-06-05 18:17:41,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:41,265 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:41,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2040122438, now seen corresponding path program 8 times [2021-06-05 18:17:41,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:41,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068497322] [2021-06-05 18:17:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:41,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:41,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068497322] [2021-06-05 18:17:41,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068497322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:41,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098605920] [2021-06-05 18:17:41,333 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 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 18:17:41,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:41,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:41,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:41,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:41,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098605920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:41,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:41,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 18:17:41,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730596076] [2021-06-05 18:17:41,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 18:17:41,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:41,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 18:17:41,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 18:17:41,497 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:17:41,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:41,669 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-06-05 18:17:41,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:17:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:41,673 INFO L225 Difference]: With dead ends: 2246 [2021-06-05 18:17:41,673 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 18:17:41,674 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:17:41,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 18:17:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-06-05 18:17:41,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 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 18:17:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-06-05 18:17:41,707 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-06-05 18:17:41,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:41,708 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-06-05 18:17:41,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 18:17:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-06-05 18:17:41,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:41,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:41,710 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] [2021-06-05 18:17:41,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:41,934 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:41,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1871308552, now seen corresponding path program 9 times [2021-06-05 18:17:41,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:41,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294999383] [2021-06-05 18:17:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:42,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:42,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294999383] [2021-06-05 18:17:42,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294999383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986480551] [2021-06-05 18:17:42,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:42,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 18:17:42,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:42,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 18:17:42,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:42,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986480551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:42,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 18:17:42,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972821714] [2021-06-05 18:17:42,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 18:17:42,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:42,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 18:17:42,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 18:17:42,163 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:42,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:42,346 INFO L93 Difference]: Finished difference Result 3193 states and 8511 transitions. [2021-06-05 18:17:42,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 18:17:42,346 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:42,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:42,352 INFO L225 Difference]: With dead ends: 3193 [2021-06-05 18:17:42,352 INFO L226 Difference]: Without dead ends: 2893 [2021-06-05 18:17:42,352 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:17:42,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2893 states. [2021-06-05 18:17:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2893 to 1853. [2021-06-05 18:17:42,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1853 states, 1852 states have (on average 2.8115550755939527) internal successors, (5207), 1852 states have internal predecessors, (5207), 0 states have call successors, (0), 0 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 18:17:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1853 states to 1853 states and 5207 transitions. [2021-06-05 18:17:42,405 INFO L78 Accepts]: Start accepts. Automaton has 1853 states and 5207 transitions. Word has length 55 [2021-06-05 18:17:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:42,405 INFO L482 AbstractCegarLoop]: Abstraction has 1853 states and 5207 transitions. [2021-06-05 18:17:42,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 18:17:42,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1853 states and 5207 transitions. [2021-06-05 18:17:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-06-05 18:17:42,412 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:42,413 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] [2021-06-05 18:17:42,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 18:17:42,629 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash -809510425, now seen corresponding path program 10 times [2021-06-05 18:17:42,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:42,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902112650] [2021-06-05 18:17:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:42,695 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 18:17:42,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902112650] [2021-06-05 18:17:42,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902112650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623605523] [2021-06-05 18:17:42,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:42,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 18:17:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:42,886 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 18:17:42,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623605523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:42,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:42,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 18:17:42,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985410073] [2021-06-05 18:17:42,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:42,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:42,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:42,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:42,888 INFO L87 Difference]: Start difference. First operand 1853 states and 5207 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:17:43,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:43,159 INFO L93 Difference]: Finished difference Result 3208 states and 8677 transitions. [2021-06-05 18:17:43,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:43,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 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 55 [2021-06-05 18:17:43,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:43,165 INFO L225 Difference]: With dead ends: 3208 [2021-06-05 18:17:43,165 INFO L226 Difference]: Without dead ends: 2426 [2021-06-05 18:17:43,165 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:17:43,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2426 states. [2021-06-05 18:17:43,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2426 to 1856. [2021-06-05 18:17:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 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 18:17:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-06-05 18:17:43,195 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-06-05 18:17:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:43,195 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-06-05 18:17:43,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:17:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-06-05 18:17:43,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:43,199 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:43,199 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:43,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:43,413 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:43,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1514387363, now seen corresponding path program 11 times [2021-06-05 18:17:43,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:43,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357044917] [2021-06-05 18:17:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:43,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:43,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357044917] [2021-06-05 18:17:43,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357044917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:43,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804775108] [2021-06-05 18:17:43,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:43,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:17:43,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:43,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804775108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:17:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688869245] [2021-06-05 18:17:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:43,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:43,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:43,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:43,732 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 18:17:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:43,936 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-06-05 18:17:43,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:17:43,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:43,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:43,940 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 18:17:43,940 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 18:17:43,940 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 18:17:43,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-06-05 18:17:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 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 18:17:43,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:17:43,965 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:17:43,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:43,966 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:17:43,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 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 18:17:43,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:17:43,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:43,968 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:43,968 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:44,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 18:17:44,181 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:44,181 INFO L82 PathProgramCache]: Analyzing trace with hash -2063950335, now seen corresponding path program 12 times [2021-06-05 18:17:44,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:44,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887717688] [2021-06-05 18:17:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:44,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887717688] [2021-06-05 18:17:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887717688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926734291] [2021-06-05 18:17:44,335 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 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 18:17:44,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:17:44,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:44,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:44,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:44,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926734291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:44,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:44,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:17:44,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38873240] [2021-06-05 18:17:44,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:44,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:44,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:44,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:44,528 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:44,725 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-06-05 18:17:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:44,730 INFO L225 Difference]: With dead ends: 2481 [2021-06-05 18:17:44,730 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 18:17:44,730 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 18:17:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-06-05 18:17:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 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 18:17:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:17:44,758 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:17:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:44,758 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:17:44,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:17:44,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:44,761 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:44,761 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:44,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:44,977 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2132101391, now seen corresponding path program 13 times [2021-06-05 18:17:44,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:44,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613185837] [2021-06-05 18:17:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:45,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:45,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613185837] [2021-06-05 18:17:45,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613185837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:45,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263656169] [2021-06-05 18:17:45,075 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 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 18:17:45,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:45,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:45,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:45,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:45,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263656169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:45,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:45,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:17:45,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533056100] [2021-06-05 18:17:45,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:45,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:45,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:45,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:45,264 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:45,529 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-06-05 18:17:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:45,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:45,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:45,533 INFO L225 Difference]: With dead ends: 2566 [2021-06-05 18:17:45,533 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 18:17:45,534 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 243.5ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:45,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 18:17:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-06-05 18:17:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 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 18:17:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:17:45,563 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:17:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:45,564 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:17:45,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:17:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:45,566 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:45,566 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:45,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 18:17:45,791 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:45,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:45,791 INFO L82 PathProgramCache]: Analyzing trace with hash 865896831, now seen corresponding path program 14 times [2021-06-05 18:17:45,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:45,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694603115] [2021-06-05 18:17:45,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:45,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:45,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:45,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694603115] [2021-06-05 18:17:45,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694603115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:45,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821576093] [2021-06-05 18:17:45,886 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 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 18:17:45,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:45,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:45,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:46,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821576093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:46,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:46,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:17:46,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049270753] [2021-06-05 18:17:46,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:46,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:46,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:46,109 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:46,345 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-06-05 18:17:46,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:17:46,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:46,350 INFO L225 Difference]: With dead ends: 2496 [2021-06-05 18:17:46,350 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 18:17:46,351 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:46,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 18:17:46,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-06-05 18:17:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 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 18:17:46,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-06-05 18:17:46,381 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-06-05 18:17:46,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:46,381 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-06-05 18:17:46,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:46,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-06-05 18:17:46,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:46,384 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:46,384 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:46,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 18:17:46,605 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:46,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:46,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1295650415, now seen corresponding path program 15 times [2021-06-05 18:17:46,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:46,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315853436] [2021-06-05 18:17:46,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:46,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:46,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315853436] [2021-06-05 18:17:46,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315853436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:46,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815735159] [2021-06-05 18:17:46,695 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 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 18:17:46,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:17:46,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:46,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:17:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:46,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815735159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:46,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:46,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:17:46,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300576616] [2021-06-05 18:17:46,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:46,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:46,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:46,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:46,885 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:47,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:47,242 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-06-05 18:17:47,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:17:47,243 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:47,246 INFO L225 Difference]: With dead ends: 3074 [2021-06-05 18:17:47,246 INFO L226 Difference]: Without dead ends: 2451 [2021-06-05 18:17:47,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:17:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-06-05 18:17:47,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-06-05 18:17:47,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 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 18:17:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-06-05 18:17:47,281 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-06-05 18:17:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:47,282 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-06-05 18:17:47,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-06-05 18:17:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:47,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:47,285 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:47,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 18:17:47,507 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1237916285, now seen corresponding path program 16 times [2021-06-05 18:17:47,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:47,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565720634] [2021-06-05 18:17:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:47,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:47,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:47,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565720634] [2021-06-05 18:17:47,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565720634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:47,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947597822] [2021-06-05 18:17:47,590 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 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 18:17:47,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:47,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:47,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:47,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947597822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:47,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:47,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 18:17:47,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383564494] [2021-06-05 18:17:47,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:47,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:47,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:47,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:47,807 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:48,114 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-06-05 18:17:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:48,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:48,117 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 18:17:48,118 INFO L226 Difference]: Without dead ends: 3008 [2021-06-05 18:17:48,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:17:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-06-05 18:17:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-06-05 18:17:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 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 18:17:48,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-06-05 18:17:48,164 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-06-05 18:17:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:48,164 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-06-05 18:17:48,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:48,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-06-05 18:17:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:48,167 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:48,167 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:48,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 18:17:48,385 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1260259535, now seen corresponding path program 17 times [2021-06-05 18:17:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:48,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118879379] [2021-06-05 18:17:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:48,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:48,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118879379] [2021-06-05 18:17:48,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118879379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349561392] [2021-06-05 18:17:48,474 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 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 18:17:48,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:17:48,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:48,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:48,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349561392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:48,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:48,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:17:48,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571068149] [2021-06-05 18:17:48,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:48,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:48,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:48,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:48,650 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:17:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:49,035 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-06-05 18:17:49,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:17:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:49,039 INFO L225 Difference]: With dead ends: 3221 [2021-06-05 18:17:49,039 INFO L226 Difference]: Without dead ends: 2646 [2021-06-05 18:17:49,040 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:17:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-06-05 18:17:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-06-05 18:17:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 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 18:17:49,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-06-05 18:17:49,071 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-06-05 18:17:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:49,071 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-06-05 18:17:49,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:17:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-06-05 18:17:49,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:49,075 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:49,075 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:49,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:49,297 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:49,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1366107511, now seen corresponding path program 18 times [2021-06-05 18:17:49,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:49,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878381972] [2021-06-05 18:17:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:49,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:49,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878381972] [2021-06-05 18:17:49,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878381972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:49,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986204633] [2021-06-05 18:17:49,407 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 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 18:17:49,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:17:49,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:49,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 18:17:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986204633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:49,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:49,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 18:17:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297047861] [2021-06-05 18:17:49,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:49,651 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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 18:17:49,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:49,840 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-06-05 18:17:49,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:49,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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 65 [2021-06-05 18:17:49,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:49,844 INFO L225 Difference]: With dead ends: 3061 [2021-06-05 18:17:49,844 INFO L226 Difference]: Without dead ends: 2712 [2021-06-05 18:17:49,844 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:17:49,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-06-05 18:17:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-06-05 18:17:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 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 18:17:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-06-05 18:17:49,875 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-06-05 18:17:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:49,875 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-06-05 18:17:49,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 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 18:17:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-06-05 18:17:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:49,878 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:49,878 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:50,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:50,101 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:50,101 INFO L82 PathProgramCache]: Analyzing trace with hash -908301467, now seen corresponding path program 19 times [2021-06-05 18:17:50,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:50,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593985467] [2021-06-05 18:17:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:50,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:50,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593985467] [2021-06-05 18:17:50,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593985467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867733459] [2021-06-05 18:17:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:50,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:50,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867733459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:50,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:50,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:17:50,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298039957] [2021-06-05 18:17:50,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:50,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:50,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:50,379 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:50,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:50,528 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-06-05 18:17:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 18:17:50,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:50,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:50,532 INFO L225 Difference]: With dead ends: 2861 [2021-06-05 18:17:50,532 INFO L226 Difference]: Without dead ends: 2576 [2021-06-05 18:17:50,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:17:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-06-05 18:17:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-06-05 18:17:50,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 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 18:17:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-06-05 18:17:50,567 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-06-05 18:17:50,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:50,567 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-06-05 18:17:50,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-06-05 18:17:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:50,570 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:50,570 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:50,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 18:17:50,793 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:50,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:50,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1371957365, now seen corresponding path program 20 times [2021-06-05 18:17:50,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:50,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370217484] [2021-06-05 18:17:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:50,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370217484] [2021-06-05 18:17:50,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370217484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:50,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843346826] [2021-06-05 18:17:50,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:50,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:50,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:50,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:50,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:51,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:51,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843346826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:51,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:51,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:17:51,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407435257] [2021-06-05 18:17:51,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:51,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:51,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:51,053 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:51,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:51,267 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-06-05 18:17:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:17:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:51,271 INFO L225 Difference]: With dead ends: 2796 [2021-06-05 18:17:51,271 INFO L226 Difference]: Without dead ends: 2511 [2021-06-05 18:17:51,271 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:51,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-06-05 18:17:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-06-05 18:17:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 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 18:17:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-06-05 18:17:51,294 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-06-05 18:17:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:51,294 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-06-05 18:17:51,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:51,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-06-05 18:17:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:51,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:51,297 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:51,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:51,508 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash -239599961, now seen corresponding path program 21 times [2021-06-05 18:17:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:51,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777909499] [2021-06-05 18:17:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:51,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:51,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777909499] [2021-06-05 18:17:51,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777909499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:51,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843098670] [2021-06-05 18:17:51,598 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:51,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 18:17:51,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:51,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:51,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:51,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843098670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:51,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:51,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:17:51,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136365632] [2021-06-05 18:17:51,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:51,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:51,793 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:51,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:51,950 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-06-05 18:17:51,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 18:17:51,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:51,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:51,953 INFO L225 Difference]: With dead ends: 2721 [2021-06-05 18:17:51,953 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 18:17:51,953 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:17:51,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 18:17:51,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-06-05 18:17:51,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 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 18:17:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-06-05 18:17:51,977 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-06-05 18:17:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:51,978 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-06-05 18:17:51,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-06-05 18:17:51,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:51,980 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:51,980 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:52,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 18:17:52,196 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:52,197 INFO L82 PathProgramCache]: Analyzing trace with hash 729288631, now seen corresponding path program 22 times [2021-06-05 18:17:52,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:52,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012720167] [2021-06-05 18:17:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:52,287 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:52,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012720167] [2021-06-05 18:17:52,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012720167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11870864] [2021-06-05 18:17:52,288 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:52,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:52,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:52,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:52,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:52,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11870864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:52,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 18:17:52,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070214925] [2021-06-05 18:17:52,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:17:52,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:52,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:17:52,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:17:52,468 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:52,703 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-06-05 18:17:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:52,706 INFO L225 Difference]: With dead ends: 2646 [2021-06-05 18:17:52,706 INFO L226 Difference]: Without dead ends: 2361 [2021-06-05 18:17:52,706 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 211.9ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:17:52,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-06-05 18:17:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-06-05 18:17:52,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 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 18:17:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-06-05 18:17:52,725 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-06-05 18:17:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:52,726 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-06-05 18:17:52,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 18:17:52,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-06-05 18:17:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:52,728 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:52,728 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:52,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 18:17:52,928 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:52,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:52,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1112824937, now seen corresponding path program 23 times [2021-06-05 18:17:52,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:52,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133242871] [2021-06-05 18:17:52,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:52,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:52,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133242871] [2021-06-05 18:17:52,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133242871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:52,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562204271] [2021-06-05 18:17:52,997 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:53,065 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 18:17:53,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:53,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 18:17:53,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:17:53,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562204271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:53,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:53,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 18:17:53,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686779343] [2021-06-05 18:17:53,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 18:17:53,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:53,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 18:17:53,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 18:17:53,163 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:53,349 INFO L93 Difference]: Finished difference Result 3593 states and 9611 transitions. [2021-06-05 18:17:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:53,353 INFO L225 Difference]: With dead ends: 3593 [2021-06-05 18:17:53,353 INFO L226 Difference]: Without dead ends: 3293 [2021-06-05 18:17:53,353 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:17:53,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-06-05 18:17:53,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 2203. [2021-06-05 18:17:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2202 states have (on average 2.818801089918256) internal successors, (6207), 2202 states have internal predecessors, (6207), 0 states have call successors, (0), 0 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 18:17:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 6207 transitions. [2021-06-05 18:17:53,382 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 6207 transitions. Word has length 65 [2021-06-05 18:17:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:53,383 INFO L482 AbstractCegarLoop]: Abstraction has 2203 states and 6207 transitions. [2021-06-05 18:17:53,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 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 18:17:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 6207 transitions. [2021-06-05 18:17:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-05 18:17:53,409 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:53,409 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2021-06-05 18:17:53,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 18:17:53,621 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -2120344232, now seen corresponding path program 24 times [2021-06-05 18:17:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:53,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867266395] [2021-06-05 18:17:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:53,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:53,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867266395] [2021-06-05 18:17:53,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867266395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:53,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995147852] [2021-06-05 18:17:53,714 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:53,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 18:17:53,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:53,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:17:53,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:53,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995147852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:53,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:53,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 18:17:53,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592984182] [2021-06-05 18:17:53,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:53,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:53,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:53,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:53,871 INFO L87 Difference]: Start difference. First operand 2203 states and 6207 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:17:54,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:54,245 INFO L93 Difference]: Finished difference Result 3608 states and 9777 transitions. [2021-06-05 18:17:54,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:17:54,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 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 65 [2021-06-05 18:17:54,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:54,250 INFO L225 Difference]: With dead ends: 3608 [2021-06-05 18:17:54,250 INFO L226 Difference]: Without dead ends: 2826 [2021-06-05 18:17:54,250 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=281, Invalid=841, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:17:54,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-06-05 18:17:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2256. [2021-06-05 18:17:54,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.73569844789357) internal successors, (6169), 2255 states have internal predecessors, (6169), 0 states have call successors, (0), 0 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 18:17:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6169 transitions. [2021-06-05 18:17:54,285 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6169 transitions. Word has length 65 [2021-06-05 18:17:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:54,285 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6169 transitions. [2021-06-05 18:17:54,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 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 18:17:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6169 transitions. [2021-06-05 18:17:54,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:54,288 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:54,288 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:17:54,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 18:17:54,489 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1333237426, now seen corresponding path program 25 times [2021-06-05 18:17:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:54,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082811717] [2021-06-05 18:17:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:54,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:54,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082811717] [2021-06-05 18:17:54,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082811717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:54,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198527578] [2021-06-05 18:17:54,609 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:54,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:54,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:54,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198527578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:54,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:54,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:54,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112259941] [2021-06-05 18:17:54,801 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:54,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:54,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:54,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:54,802 INFO L87 Difference]: Start difference. First operand 2256 states and 6169 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 18:17:55,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:55,008 INFO L93 Difference]: Finished difference Result 2766 states and 7317 transitions. [2021-06-05 18:17:55,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:17:55,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 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 75 [2021-06-05 18:17:55,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:55,016 INFO L225 Difference]: With dead ends: 2766 [2021-06-05 18:17:55,016 INFO L226 Difference]: Without dead ends: 2496 [2021-06-05 18:17:55,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-06-05 18:17:55,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2331. [2021-06-05 18:17:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 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 18:17:55,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 18:17:55,042 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 18:17:55,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:55,042 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 18:17:55,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 0 states have call successors, (0), 0 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 18:17:55,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 18:17:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:55,045 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:55,045 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:17:55,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 18:17:55,268 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:55,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1814233586, now seen corresponding path program 26 times [2021-06-05 18:17:55,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:55,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610418250] [2021-06-05 18:17:55,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:55,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610418250] [2021-06-05 18:17:55,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610418250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:55,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459576218] [2021-06-05 18:17:55,406 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:55,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:17:55,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:55,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:55,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:55,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459576218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:55,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:55,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:17:55,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112523623] [2021-06-05 18:17:55,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:55,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:55,661 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:17:55,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:55,875 INFO L93 Difference]: Finished difference Result 2981 states and 7747 transitions. [2021-06-05 18:17:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:17:55,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 75 [2021-06-05 18:17:55,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:55,878 INFO L225 Difference]: With dead ends: 2981 [2021-06-05 18:17:55,878 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 18:17:55,879 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:17:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 18:17:55,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2331. [2021-06-05 18:17:55,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 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 18:17:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 18:17:55,906 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 18:17:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:55,907 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 18:17:55,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:17:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 18:17:55,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:55,909 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:55,909 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:17:56,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:56,125 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1128050402, now seen corresponding path program 27 times [2021-06-05 18:17:56,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:56,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090625274] [2021-06-05 18:17:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:56,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090625274] [2021-06-05 18:17:56,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090625274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:56,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245152975] [2021-06-05 18:17:56,246 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:56,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:17:56,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:56,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245152975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:56,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:56,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:56,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81965994] [2021-06-05 18:17:56,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:56,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:56,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:56,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:56,443 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:17:56,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:56,691 INFO L93 Difference]: Finished difference Result 3116 states and 8017 transitions. [2021-06-05 18:17:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:17:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:17:56,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:56,694 INFO L225 Difference]: With dead ends: 3116 [2021-06-05 18:17:56,694 INFO L226 Difference]: Without dead ends: 2846 [2021-06-05 18:17:56,695 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 245.3ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-06-05 18:17:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2331. [2021-06-05 18:17:56,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 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 18:17:56,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 18:17:56,725 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 18:17:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:56,726 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 18:17:56,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:17:56,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 18:17:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:56,729 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:56,729 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:17:56,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 18:17:56,949 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1043015664, now seen corresponding path program 28 times [2021-06-05 18:17:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:56,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418871317] [2021-06-05 18:17:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:57,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:57,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418871317] [2021-06-05 18:17:57,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418871317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154118751] [2021-06-05 18:17:57,041 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:57,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:17:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:57,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154118751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:57,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:17:57,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304447184] [2021-06-05 18:17:57,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:57,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:57,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:57,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:57,196 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:17:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:57,447 INFO L93 Difference]: Finished difference Result 3046 states and 7877 transitions. [2021-06-05 18:17:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:17:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 75 [2021-06-05 18:17:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:57,449 INFO L225 Difference]: With dead ends: 3046 [2021-06-05 18:17:57,449 INFO L226 Difference]: Without dead ends: 2776 [2021-06-05 18:17:57,450 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-06-05 18:17:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-06-05 18:17:57,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2331. [2021-06-05 18:17:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 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 18:17:57,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 18:17:57,472 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 18:17:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:57,472 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 18:17:57,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:17:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 18:17:57,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:57,475 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:57,475 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:17:57,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 18:17:57,675 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:57,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:57,676 INFO L82 PathProgramCache]: Analyzing trace with hash 974864608, now seen corresponding path program 29 times [2021-06-05 18:17:57,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:57,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534698575] [2021-06-05 18:17:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:57,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:57,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534698575] [2021-06-05 18:17:57,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534698575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:57,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821404110] [2021-06-05 18:17:57,814 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:57,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:17:57,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:57,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:58,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821404110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:58,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:58,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:58,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062235419] [2021-06-05 18:17:58,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:58,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:58,017 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:17:58,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:58,335 INFO L93 Difference]: Finished difference Result 2971 states and 7727 transitions. [2021-06-05 18:17:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:17:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:17:58,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:58,338 INFO L225 Difference]: With dead ends: 2971 [2021-06-05 18:17:58,339 INFO L226 Difference]: Without dead ends: 2701 [2021-06-05 18:17:58,339 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 307.2ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-06-05 18:17:58,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2331. [2021-06-05 18:17:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 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 18:17:58,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 18:17:58,370 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 18:17:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:58,370 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 18:17:58,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:17:58,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 18:17:58,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:58,373 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:58,373 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:17:58,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:58,589 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:58,589 INFO L82 PathProgramCache]: Analyzing trace with hash -322104466, now seen corresponding path program 30 times [2021-06-05 18:17:58,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:58,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226382882] [2021-06-05 18:17:58,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:58,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:58,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226382882] [2021-06-05 18:17:58,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226382882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:58,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865973523] [2021-06-05 18:17:58,684 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:58,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:17:58,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:17:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:58,843 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:58,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865973523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:58,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:58,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:17:58,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333943711] [2021-06-05 18:17:58,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:17:58,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:58,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:17:58,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:17:58,844 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:17:59,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:59,098 INFO L93 Difference]: Finished difference Result 2896 states and 7577 transitions. [2021-06-05 18:17:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:17:59,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 75 [2021-06-05 18:17:59,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:59,101 INFO L225 Difference]: With dead ends: 2896 [2021-06-05 18:17:59,101 INFO L226 Difference]: Without dead ends: 2626 [2021-06-05 18:17:59,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:17:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-06-05 18:17:59,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2331. [2021-06-05 18:17:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 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 18:17:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-06-05 18:17:59,129 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-06-05 18:17:59,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:17:59,129 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-06-05 18:17:59,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:17:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-06-05 18:17:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:17:59,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:17:59,132 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:17:59,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 18:17:59,354 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:17:59,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:17:59,354 INFO L82 PathProgramCache]: Analyzing trace with hash 107649118, now seen corresponding path program 31 times [2021-06-05 18:17:59,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:17:59,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350969878] [2021-06-05 18:17:59,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:17:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:59,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:17:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350969878] [2021-06-05 18:17:59,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350969878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:59,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646856597] [2021-06-05 18:17:59,447 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:17:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:17:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:17:59,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:17:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:17:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646856597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:17:59,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:17:59,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:17:59,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106544450] [2021-06-05 18:17:59,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:17:59,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:17:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:17:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:17:59,607 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:17:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:17:59,982 INFO L93 Difference]: Finished difference Result 3474 states and 9203 transitions. [2021-06-05 18:17:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:17:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:17:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:17:59,984 INFO L225 Difference]: With dead ends: 3474 [2021-06-05 18:17:59,984 INFO L226 Difference]: Without dead ends: 2851 [2021-06-05 18:17:59,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:17:59,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-06-05 18:18:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2361. [2021-06-05 18:18:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 2.730508474576271) internal successors, (6444), 2360 states have internal predecessors, (6444), 0 states have call successors, (0), 0 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 18:18:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 6444 transitions. [2021-06-05 18:18:00,017 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 6444 transitions. Word has length 75 [2021-06-05 18:18:00,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:00,017 INFO L482 AbstractCegarLoop]: Abstraction has 2361 states and 6444 transitions. [2021-06-05 18:18:00,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 6444 transitions. [2021-06-05 18:18:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:00,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:00,020 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:00,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:00,244 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:00,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:00,244 INFO L82 PathProgramCache]: Analyzing trace with hash 49914988, now seen corresponding path program 32 times [2021-06-05 18:18:00,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:00,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166210016] [2021-06-05 18:18:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:00,345 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:00,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:00,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166210016] [2021-06-05 18:18:00,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166210016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:00,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385805381] [2021-06-05 18:18:00,345 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:00,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:00,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:00,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:00,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385805381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:00,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:00,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 18:18:00,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339993275] [2021-06-05 18:18:00,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:18:00,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:00,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:18:00,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:18:00,531 INFO L87 Difference]: Start difference. First operand 2361 states and 6444 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:18:00,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:00,812 INFO L93 Difference]: Finished difference Result 3678 states and 9871 transitions. [2021-06-05 18:18:00,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:00,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 75 [2021-06-05 18:18:00,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:00,816 INFO L225 Difference]: With dead ends: 3678 [2021-06-05 18:18:00,817 INFO L226 Difference]: Without dead ends: 3408 [2021-06-05 18:18:00,817 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:18:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-06-05 18:18:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2541. [2021-06-05 18:18:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.7570866141732284) internal successors, (7003), 2540 states have internal predecessors, (7003), 0 states have call successors, (0), 0 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 18:18:00,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7003 transitions. [2021-06-05 18:18:00,858 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7003 transitions. Word has length 75 [2021-06-05 18:18:00,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:00,859 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7003 transitions. [2021-06-05 18:18:00,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 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 18:18:00,860 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7003 transitions. [2021-06-05 18:18:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:00,863 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:00,863 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:01,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 18:18:01,086 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:01,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:01,087 INFO L82 PathProgramCache]: Analyzing trace with hash 72258238, now seen corresponding path program 33 times [2021-06-05 18:18:01,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:01,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886961575] [2021-06-05 18:18:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:01,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:01,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886961575] [2021-06-05 18:18:01,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886961575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490729898] [2021-06-05 18:18:01,200 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:01,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:18:01,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:01,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:01,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490729898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:01,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:01,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:18:01,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779815368] [2021-06-05 18:18:01,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:18:01,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:18:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:18:01,405 INFO L87 Difference]: Start difference. First operand 2541 states and 7003 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:01,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:01,778 INFO L93 Difference]: Finished difference Result 3125 states and 8491 transitions. [2021-06-05 18:18:01,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:01,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:18:01,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:01,781 INFO L225 Difference]: With dead ends: 3125 [2021-06-05 18:18:01,781 INFO L226 Difference]: Without dead ends: 2636 [2021-06-05 18:18:01,782 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 331.2ms TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:18:01,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-06-05 18:18:01,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2486. [2021-06-05 18:18:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.752112676056338) internal successors, (6839), 2485 states have internal predecessors, (6839), 0 states have call successors, (0), 0 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 18:18:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-06-05 18:18:01,807 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-06-05 18:18:01,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:01,808 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-06-05 18:18:01,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:01,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-06-05 18:18:01,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:01,810 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:01,810 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:02,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 18:18:02,011 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:02,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:02,011 INFO L82 PathProgramCache]: Analyzing trace with hash -585056520, now seen corresponding path program 34 times [2021-06-05 18:18:02,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:02,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415320431] [2021-06-05 18:18:02,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:02,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:02,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415320431] [2021-06-05 18:18:02,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415320431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:02,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483288255] [2021-06-05 18:18:02,133 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:02,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 18:18:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:02,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483288255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:02,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:02,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 18:18:02,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395090318] [2021-06-05 18:18:02,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:18:02,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:18:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:18:02,316 INFO L87 Difference]: Start difference. First operand 2486 states and 6839 transitions. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 18:18:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:02,528 INFO L93 Difference]: Finished difference Result 3591 states and 9369 transitions. [2021-06-05 18:18:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:18:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 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 75 [2021-06-05 18:18:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:02,531 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 18:18:02,531 INFO L226 Difference]: Without dead ends: 3242 [2021-06-05 18:18:02,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:18:02,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-06-05 18:18:02,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2488. [2021-06-05 18:18:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7515078407720144) internal successors, (6843), 2487 states have internal predecessors, (6843), 0 states have call successors, (0), 0 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 18:18:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6843 transitions. [2021-06-05 18:18:02,567 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6843 transitions. Word has length 75 [2021-06-05 18:18:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:02,567 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6843 transitions. [2021-06-05 18:18:02,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 18:18:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6843 transitions. [2021-06-05 18:18:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:02,569 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:02,569 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:02,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 18:18:02,771 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:02,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:02,771 INFO L82 PathProgramCache]: Analyzing trace with hash -901780268, now seen corresponding path program 35 times [2021-06-05 18:18:02,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:02,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844741225] [2021-06-05 18:18:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:02,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844741225] [2021-06-05 18:18:02,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844741225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:02,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201439794] [2021-06-05 18:18:02,861 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:02,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:18:02,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:18:02,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:03,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201439794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:03,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:03,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 18:18:03,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169978334] [2021-06-05 18:18:03,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:18:03,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:03,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:18:03,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:18:03,015 INFO L87 Difference]: Start difference. First operand 2488 states and 6843 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 18:18:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:03,160 INFO L93 Difference]: Finished difference Result 3441 states and 8877 transitions. [2021-06-05 18:18:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 18:18:03,160 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 75 [2021-06-05 18:18:03,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:03,163 INFO L225 Difference]: With dead ends: 3441 [2021-06-05 18:18:03,163 INFO L226 Difference]: Without dead ends: 3156 [2021-06-05 18:18:03,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:18:03,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-06-05 18:18:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2468. [2021-06-05 18:18:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 2.7576003242805025) internal successors, (6803), 2467 states have internal predecessors, (6803), 0 states have call successors, (0), 0 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 18:18:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 6803 transitions. [2021-06-05 18:18:03,190 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 6803 transitions. Word has length 75 [2021-06-05 18:18:03,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:03,190 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 6803 transitions. [2021-06-05 18:18:03,190 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 18:18:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 6803 transitions. [2021-06-05 18:18:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:03,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:03,193 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:03,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 18:18:03,393 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:03,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:03,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1780689436, now seen corresponding path program 36 times [2021-06-05 18:18:03,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:03,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290288738] [2021-06-05 18:18:03,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:03,497 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:03,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:03,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290288738] [2021-06-05 18:18:03,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290288738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:03,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27948255] [2021-06-05 18:18:03,497 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:03,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:18:03,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:03,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:18:03,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:03,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27948255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:03,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:03,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:18:03,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771338080] [2021-06-05 18:18:03,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:18:03,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:03,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:18:03,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:18:03,681 INFO L87 Difference]: Start difference. First operand 2468 states and 6803 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:03,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:03,901 INFO L93 Difference]: Finished difference Result 3376 states and 8747 transitions. [2021-06-05 18:18:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:18:03,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:18:03,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:03,904 INFO L225 Difference]: With dead ends: 3376 [2021-06-05 18:18:03,905 INFO L226 Difference]: Without dead ends: 3091 [2021-06-05 18:18:03,905 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:18:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-06-05 18:18:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2443. [2021-06-05 18:18:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 2.7653562653562656) internal successors, (6753), 2442 states have internal predecessors, (6753), 0 states have call successors, (0), 0 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 18:18:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 6753 transitions. [2021-06-05 18:18:03,955 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 6753 transitions. Word has length 75 [2021-06-05 18:18:03,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:03,955 INFO L482 AbstractCegarLoop]: Abstraction has 2443 states and 6753 transitions. [2021-06-05 18:18:03,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:03,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 6753 transitions. [2021-06-05 18:18:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:03,958 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:03,958 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:04,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:04,173 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:04,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:04,173 INFO L82 PathProgramCache]: Analyzing trace with hash -772418154, now seen corresponding path program 37 times [2021-06-05 18:18:04,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:04,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081945002] [2021-06-05 18:18:04,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:04,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081945002] [2021-06-05 18:18:04,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081945002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:04,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539768683] [2021-06-05 18:18:04,265 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:18:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:04,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539768683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:04,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:04,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 18:18:04,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099327765] [2021-06-05 18:18:04,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:18:04,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:04,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:18:04,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:18:04,443 INFO L87 Difference]: Start difference. First operand 2443 states and 6753 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 18:18:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:04,635 INFO L93 Difference]: Finished difference Result 3301 states and 8597 transitions. [2021-06-05 18:18:04,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 18:18:04,636 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 75 [2021-06-05 18:18:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:04,638 INFO L225 Difference]: With dead ends: 3301 [2021-06-05 18:18:04,638 INFO L226 Difference]: Without dead ends: 3016 [2021-06-05 18:18:04,639 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:18:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-06-05 18:18:04,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2418. [2021-06-05 18:18:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7732726520479933) internal successors, (6703), 2417 states have internal predecessors, (6703), 0 states have call successors, (0), 0 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 18:18:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6703 transitions. [2021-06-05 18:18:04,667 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6703 transitions. Word has length 75 [2021-06-05 18:18:04,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:04,667 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6703 transitions. [2021-06-05 18:18:04,667 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 18:18:04,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6703 transitions. [2021-06-05 18:18:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:04,669 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:04,669 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:04,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 18:18:04,870 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:04,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:04,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1507840678, now seen corresponding path program 38 times [2021-06-05 18:18:04,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:04,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861655673] [2021-06-05 18:18:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:04,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:04,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861655673] [2021-06-05 18:18:04,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861655673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:04,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552937808] [2021-06-05 18:18:04,969 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:05,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:05,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:05,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:18:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:05,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552937808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:05,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:18:05,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124327560] [2021-06-05 18:18:05,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:18:05,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:18:05,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:18:05,151 INFO L87 Difference]: Start difference. First operand 2418 states and 6703 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:05,416 INFO L93 Difference]: Finished difference Result 3226 states and 8447 transitions. [2021-06-05 18:18:05,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:18:05,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:18:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:05,419 INFO L225 Difference]: With dead ends: 3226 [2021-06-05 18:18:05,419 INFO L226 Difference]: Without dead ends: 2941 [2021-06-05 18:18:05,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 251.8ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:18:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-06-05 18:18:05,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2393. [2021-06-05 18:18:05,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 2.7813545150501673) internal successors, (6653), 2392 states have internal predecessors, (6653), 0 states have call successors, (0), 0 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 18:18:05,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 6653 transitions. [2021-06-05 18:18:05,442 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 6653 transitions. Word has length 75 [2021-06-05 18:18:05,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:05,443 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 6653 transitions. [2021-06-05 18:18:05,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:05,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 6653 transitions. [2021-06-05 18:18:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:05,444 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:05,444 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:05,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:05,645 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:05,645 INFO L82 PathProgramCache]: Analyzing trace with hash -103716648, now seen corresponding path program 39 times [2021-06-05 18:18:05,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:05,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114869502] [2021-06-05 18:18:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:05,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:05,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114869502] [2021-06-05 18:18:05,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114869502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970027822] [2021-06-05 18:18:05,726 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:05,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 18:18:05,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:05,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:05,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:05,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970027822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:05,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:05,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 18:18:05,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562689008] [2021-06-05 18:18:05,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:18:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:05,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:18:05,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:18:05,878 INFO L87 Difference]: Start difference. First operand 2393 states and 6653 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 18:18:06,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:06,086 INFO L93 Difference]: Finished difference Result 3151 states and 8297 transitions. [2021-06-05 18:18:06,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:18:06,087 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 75 [2021-06-05 18:18:06,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:06,089 INFO L225 Difference]: With dead ends: 3151 [2021-06-05 18:18:06,089 INFO L226 Difference]: Without dead ends: 2866 [2021-06-05 18:18:06,090 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:18:06,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-06-05 18:18:06,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2368. [2021-06-05 18:18:06,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.7896070975918885) internal successors, (6603), 2367 states have internal predecessors, (6603), 0 states have call successors, (0), 0 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 18:18:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6603 transitions. [2021-06-05 18:18:06,127 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6603 transitions. Word has length 75 [2021-06-05 18:18:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:06,127 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6603 transitions. [2021-06-05 18:18:06,127 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 18:18:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6603 transitions. [2021-06-05 18:18:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:06,130 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:06,130 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:06,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:06,345 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:06,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:06,345 INFO L82 PathProgramCache]: Analyzing trace with hash 865171944, now seen corresponding path program 40 times [2021-06-05 18:18:06,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:06,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556651101] [2021-06-05 18:18:06,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:06,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:06,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:06,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556651101] [2021-06-05 18:18:06,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556651101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:06,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287485761] [2021-06-05 18:18:06,432 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:06,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:06,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:06,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:18:06,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:06,593 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:06,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287485761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:06,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:06,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 18:18:06,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923124591] [2021-06-05 18:18:06,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 18:18:06,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:06,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 18:18:06,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 18:18:06,595 INFO L87 Difference]: Start difference. First operand 2368 states and 6603 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:06,978 INFO L93 Difference]: Finished difference Result 3076 states and 8147 transitions. [2021-06-05 18:18:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:18:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:06,983 INFO L225 Difference]: With dead ends: 3076 [2021-06-05 18:18:06,983 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 18:18:06,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:18:06,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 18:18:07,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2343. [2021-06-05 18:18:07,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.7980358667805296) internal successors, (6553), 2342 states have internal predecessors, (6553), 0 states have call successors, (0), 0 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 18:18:07,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 6553 transitions. [2021-06-05 18:18:07,016 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 6553 transitions. Word has length 75 [2021-06-05 18:18:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:07,017 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 6553 transitions. [2021-06-05 18:18:07,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 6553 transitions. [2021-06-05 18:18:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:07,020 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:07,020 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:07,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 18:18:07,233 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:07,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1248708250, now seen corresponding path program 41 times [2021-06-05 18:18:07,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:07,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390917214] [2021-06-05 18:18:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:07,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:07,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:07,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390917214] [2021-06-05 18:18:07,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390917214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:07,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809155624] [2021-06-05 18:18:07,322 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:07,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 18:18:07,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 18:18:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 18:18:07,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809155624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:07,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:07,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-05 18:18:07,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347581298] [2021-06-05 18:18:07,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 18:18:07,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:07,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 18:18:07,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 18:18:07,496 INFO L87 Difference]: Start difference. First operand 2343 states and 6553 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 18:18:07,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:07,768 INFO L93 Difference]: Finished difference Result 3903 states and 10471 transitions. [2021-06-05 18:18:07,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:18:07,768 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 75 [2021-06-05 18:18:07,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:07,773 INFO L225 Difference]: With dead ends: 3903 [2021-06-05 18:18:07,773 INFO L226 Difference]: Without dead ends: 3603 [2021-06-05 18:18:07,773 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=242, Invalid=628, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:18:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3603 states. [2021-06-05 18:18:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3603 to 2508. [2021-06-05 18:18:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 2.820901475867571) internal successors, (7072), 2507 states have internal predecessors, (7072), 0 states have call successors, (0), 0 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 18:18:07,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 7072 transitions. [2021-06-05 18:18:07,815 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 7072 transitions. Word has length 75 [2021-06-05 18:18:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:07,815 INFO L482 AbstractCegarLoop]: Abstraction has 2508 states and 7072 transitions. [2021-06-05 18:18:07,815 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 18:18:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 7072 transitions. [2021-06-05 18:18:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-06-05 18:18:07,817 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:07,817 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2021-06-05 18:18:08,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:08,033 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1984460919, now seen corresponding path program 42 times [2021-06-05 18:18:08,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136859558] [2021-06-05 18:18:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:08,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:08,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136859558] [2021-06-05 18:18:08,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136859558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:08,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558026283] [2021-06-05 18:18:08,130 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:08,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 18:18:08,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:08,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:08,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:08,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558026283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:08,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:08,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 18:18:08,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713364479] [2021-06-05 18:18:08,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:18:08,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:08,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:18:08,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:18:08,324 INFO L87 Difference]: Start difference. First operand 2508 states and 7072 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:08,699 INFO L93 Difference]: Finished difference Result 3285 states and 8946 transitions. [2021-06-05 18:18:08,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:08,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 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 75 [2021-06-05 18:18:08,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:08,702 INFO L225 Difference]: With dead ends: 3285 [2021-06-05 18:18:08,702 INFO L226 Difference]: Without dead ends: 2706 [2021-06-05 18:18:08,702 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:08,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-06-05 18:18:08,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1634. [2021-06-05 18:18:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.7348438456827924) internal successors, (4466), 1633 states have internal predecessors, (4466), 0 states have call successors, (0), 0 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 18:18:08,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4466 transitions. [2021-06-05 18:18:08,720 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4466 transitions. Word has length 75 [2021-06-05 18:18:08,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:08,720 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 4466 transitions. [2021-06-05 18:18:08,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 18:18:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4466 transitions. [2021-06-05 18:18:08,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:08,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:08,721 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:08,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 18:18:08,925 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash -711333330, now seen corresponding path program 43 times [2021-06-05 18:18:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:08,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53739538] [2021-06-05 18:18:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:08,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:09,046 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:09,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:09,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53739538] [2021-06-05 18:18:09,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53739538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:09,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885243907] [2021-06-05 18:18:09,047 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:09,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885243907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:09,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:09,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:09,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524008349] [2021-06-05 18:18:09,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:09,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:09,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:09,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:09,232 INFO L87 Difference]: Start difference. First operand 1634 states and 4466 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:18:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:09,499 INFO L93 Difference]: Finished difference Result 2524 states and 6566 transitions. [2021-06-05 18:18:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:18:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 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 80 [2021-06-05 18:18:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:09,502 INFO L225 Difference]: With dead ends: 2524 [2021-06-05 18:18:09,502 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 18:18:09,503 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:18:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 18:18:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1719. [2021-06-05 18:18:09,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 2.6984866123399303) internal successors, (4636), 1718 states have internal predecessors, (4636), 0 states have call successors, (0), 0 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 18:18:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 4636 transitions. [2021-06-05 18:18:09,521 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 4636 transitions. Word has length 80 [2021-06-05 18:18:09,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:09,521 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 4636 transitions. [2021-06-05 18:18:09,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:18:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 4636 transitions. [2021-06-05 18:18:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:09,523 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:09,523 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:09,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:09,723 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:09,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:09,724 INFO L82 PathProgramCache]: Analyzing trace with hash -2057763374, now seen corresponding path program 44 times [2021-06-05 18:18:09,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:09,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668072193] [2021-06-05 18:18:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:09,848 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:09,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:09,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668072193] [2021-06-05 18:18:09,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668072193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:09,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158760890] [2021-06-05 18:18:09,849 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:09,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:09,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:09,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:09,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:10,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158760890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:10,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:10,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:18:10,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746029296] [2021-06-05 18:18:10,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:18:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:10,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:18:10,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:18:10,036 INFO L87 Difference]: Start difference. First operand 1719 states and 4636 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 18:18:10,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:10,232 INFO L93 Difference]: Finished difference Result 2946 states and 7347 transitions. [2021-06-05 18:18:10,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 18:18:10,233 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 80 [2021-06-05 18:18:10,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:10,235 INFO L225 Difference]: With dead ends: 2946 [2021-06-05 18:18:10,235 INFO L226 Difference]: Without dead ends: 2676 [2021-06-05 18:18:10,235 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-06-05 18:18:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-06-05 18:18:10,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1863. [2021-06-05 18:18:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.71374865735768) internal successors, (5053), 1862 states have internal predecessors, (5053), 0 states have call successors, (0), 0 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 18:18:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5053 transitions. [2021-06-05 18:18:10,257 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5053 transitions. Word has length 80 [2021-06-05 18:18:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:10,257 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5053 transitions. [2021-06-05 18:18:10,257 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 18:18:10,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5053 transitions. [2021-06-05 18:18:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:10,259 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:10,259 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:10,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 18:18:10,466 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:10,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:10,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1337149122, now seen corresponding path program 45 times [2021-06-05 18:18:10,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:10,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818665476] [2021-06-05 18:18:10,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:10,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:10,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818665476] [2021-06-05 18:18:10,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818665476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:10,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264314714] [2021-06-05 18:18:10,602 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:10,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:18:10,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:10,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264314714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:10,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:10,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:18:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046746832] [2021-06-05 18:18:10,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:18:10,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:18:10,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:18:10,781 INFO L87 Difference]: Start difference. First operand 1863 states and 5053 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:11,064 INFO L93 Difference]: Finished difference Result 2906 states and 7342 transitions. [2021-06-05 18:18:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:18:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-06-05 18:18:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:11,067 INFO L225 Difference]: With dead ends: 2906 [2021-06-05 18:18:11,068 INFO L226 Difference]: Without dead ends: 2636 [2021-06-05 18:18:11,068 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:18:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-06-05 18:18:11,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1938. [2021-06-05 18:18:11,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.7248322147651005) internal successors, (5278), 1937 states have internal predecessors, (5278), 0 states have call successors, (0), 0 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 18:18:11,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 5278 transitions. [2021-06-05 18:18:11,097 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 5278 transitions. Word has length 80 [2021-06-05 18:18:11,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:11,097 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 5278 transitions. [2021-06-05 18:18:11,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:11,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 5278 transitions. [2021-06-05 18:18:11,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:11,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:11,099 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:11,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 18:18:11,318 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:11,318 INFO L82 PathProgramCache]: Analyzing trace with hash 908084816, now seen corresponding path program 46 times [2021-06-05 18:18:11,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:11,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282546359] [2021-06-05 18:18:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:11,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:11,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282546359] [2021-06-05 18:18:11,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282546359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:11,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581378954] [2021-06-05 18:18:11,443 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:11,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:11,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581378954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:11,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:11,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:18:11,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393417049] [2021-06-05 18:18:11,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:18:11,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:11,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:18:11,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:18:11,643 INFO L87 Difference]: Start difference. First operand 1938 states and 5278 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 18:18:11,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:11,867 INFO L93 Difference]: Finished difference Result 2956 states and 7517 transitions. [2021-06-05 18:18:11,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 18:18:11,868 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 80 [2021-06-05 18:18:11,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:11,870 INFO L225 Difference]: With dead ends: 2956 [2021-06-05 18:18:11,870 INFO L226 Difference]: Without dead ends: 2686 [2021-06-05 18:18:11,871 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-06-05 18:18:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-06-05 18:18:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2013. [2021-06-05 18:18:11,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.735089463220676) internal successors, (5503), 2012 states have internal predecessors, (5503), 0 states have call successors, (0), 0 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 18:18:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5503 transitions. [2021-06-05 18:18:11,890 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5503 transitions. Word has length 80 [2021-06-05 18:18:11,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:11,890 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5503 transitions. [2021-06-05 18:18:11,890 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 18:18:11,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5503 transitions. [2021-06-05 18:18:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:11,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:11,892 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:12,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 18:18:12,092 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:12,093 INFO L82 PathProgramCache]: Analyzing trace with hash 221901632, now seen corresponding path program 47 times [2021-06-05 18:18:12,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:12,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470468521] [2021-06-05 18:18:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:12,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:12,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470468521] [2021-06-05 18:18:12,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470468521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:12,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168144007] [2021-06-05 18:18:12,200 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:12,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:18:12,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:12,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:12,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:12,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168144007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:12,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:12,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:18:12,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948555656] [2021-06-05 18:18:12,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:18:12,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:18:12,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:18:12,379 INFO L87 Difference]: Start difference. First operand 2013 states and 5503 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:12,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:12,690 INFO L93 Difference]: Finished difference Result 2981 states and 7642 transitions. [2021-06-05 18:18:12,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:12,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-06-05 18:18:12,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:12,693 INFO L225 Difference]: With dead ends: 2981 [2021-06-05 18:18:12,693 INFO L226 Difference]: Without dead ends: 2711 [2021-06-05 18:18:12,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:18:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-06-05 18:18:12,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2088. [2021-06-05 18:18:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 2.744609487302348) internal successors, (5728), 2087 states have internal predecessors, (5728), 0 states have call successors, (0), 0 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 18:18:12,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 5728 transitions. [2021-06-05 18:18:12,717 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 5728 transitions. Word has length 80 [2021-06-05 18:18:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:12,717 INFO L482 AbstractCegarLoop]: Abstraction has 2088 states and 5728 transitions. [2021-06-05 18:18:12,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 5728 transitions. [2021-06-05 18:18:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:12,719 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:12,719 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:12,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 18:18:12,919 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash 136866894, now seen corresponding path program 48 times [2021-06-05 18:18:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:12,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638323306] [2021-06-05 18:18:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:13,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:13,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638323306] [2021-06-05 18:18:13,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638323306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:13,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011694104] [2021-06-05 18:18:13,026 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:13,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:18:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:13,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:13,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011694104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:13,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:13,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:18:13,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248854656] [2021-06-05 18:18:13,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:18:13,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:13,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:18:13,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:18:13,201 INFO L87 Difference]: Start difference. First operand 2088 states and 5728 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 18:18:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:13,445 INFO L93 Difference]: Finished difference Result 3006 states and 7767 transitions. [2021-06-05 18:18:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:18:13,446 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 80 [2021-06-05 18:18:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:13,448 INFO L225 Difference]: With dead ends: 3006 [2021-06-05 18:18:13,448 INFO L226 Difference]: Without dead ends: 2736 [2021-06-05 18:18:13,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-06-05 18:18:13,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-06-05 18:18:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2163. [2021-06-05 18:18:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.7534690101757633) internal successors, (5953), 2162 states have internal predecessors, (5953), 0 states have call successors, (0), 0 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 18:18:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 5953 transitions. [2021-06-05 18:18:13,476 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 5953 transitions. Word has length 80 [2021-06-05 18:18:13,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:13,476 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 5953 transitions. [2021-06-05 18:18:13,476 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 18:18:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 5953 transitions. [2021-06-05 18:18:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:13,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:13,478 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:13,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:13,685 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:13,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:13,685 INFO L82 PathProgramCache]: Analyzing trace with hash 68715838, now seen corresponding path program 49 times [2021-06-05 18:18:13,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:13,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265643198] [2021-06-05 18:18:13,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:13,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:13,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265643198] [2021-06-05 18:18:13,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265643198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:13,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550238862] [2021-06-05 18:18:13,793 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:13,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:13,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:13,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550238862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:13,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:13,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:18:13,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748919077] [2021-06-05 18:18:13,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:18:13,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:13,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:18:13,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:18:13,963 INFO L87 Difference]: Start difference. First operand 2163 states and 5953 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:14,328 INFO L93 Difference]: Finished difference Result 3031 states and 7892 transitions. [2021-06-05 18:18:14,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:14,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-06-05 18:18:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:14,332 INFO L225 Difference]: With dead ends: 3031 [2021-06-05 18:18:14,332 INFO L226 Difference]: Without dead ends: 2761 [2021-06-05 18:18:14,332 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-06-05 18:18:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2238. [2021-06-05 18:18:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 2.761734465802414) internal successors, (6178), 2237 states have internal predecessors, (6178), 0 states have call successors, (0), 0 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 18:18:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 6178 transitions. [2021-06-05 18:18:14,365 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 6178 transitions. Word has length 80 [2021-06-05 18:18:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:14,365 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 6178 transitions. [2021-06-05 18:18:14,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 6178 transitions. [2021-06-05 18:18:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:14,367 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:14,367 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:14,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 18:18:14,573 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1228253236, now seen corresponding path program 50 times [2021-06-05 18:18:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:14,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489914124] [2021-06-05 18:18:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:14,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:14,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489914124] [2021-06-05 18:18:14,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489914124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:14,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728928950] [2021-06-05 18:18:14,704 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:14,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:14,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:14,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728928950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:14,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:14,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:18:14,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065719488] [2021-06-05 18:18:14,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:18:14,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:14,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:18:14,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:18:14,903 INFO L87 Difference]: Start difference. First operand 2238 states and 6178 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 18:18:15,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:15,207 INFO L93 Difference]: Finished difference Result 3056 states and 8017 transitions. [2021-06-05 18:18:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:15,207 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 80 [2021-06-05 18:18:15,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:15,210 INFO L225 Difference]: With dead ends: 3056 [2021-06-05 18:18:15,210 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 18:18:15,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 18:18:15,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 18:18:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2313. [2021-06-05 18:18:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.769463667820069) internal successors, (6403), 2312 states have internal predecessors, (6403), 0 states have call successors, (0), 0 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 18:18:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6403 transitions. [2021-06-05 18:18:15,233 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6403 transitions. Word has length 80 [2021-06-05 18:18:15,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:15,233 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6403 transitions. [2021-06-05 18:18:15,233 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 18:18:15,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6403 transitions. [2021-06-05 18:18:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:15,235 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:15,235 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:15,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:15,436 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:15,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:15,436 INFO L82 PathProgramCache]: Analyzing trace with hash -798499652, now seen corresponding path program 51 times [2021-06-05 18:18:15,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:15,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230840659] [2021-06-05 18:18:15,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:15,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:15,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:15,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230840659] [2021-06-05 18:18:15,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230840659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:15,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255295945] [2021-06-05 18:18:15,541 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:15,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:18:15,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:15,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:15,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:15,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255295945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:15,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:15,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 18:18:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729735425] [2021-06-05 18:18:15,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 18:18:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 18:18:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 18:18:15,712 INFO L87 Difference]: Start difference. First operand 2313 states and 6403 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:16,089 INFO L93 Difference]: Finished difference Result 3141 states and 8307 transitions. [2021-06-05 18:18:16,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:16,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 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 80 [2021-06-05 18:18:16,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:16,092 INFO L225 Difference]: With dead ends: 3141 [2021-06-05 18:18:16,092 INFO L226 Difference]: Without dead ends: 2871 [2021-06-05 18:18:16,092 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-06-05 18:18:16,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2388. [2021-06-05 18:18:16,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 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 18:18:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-06-05 18:18:16,115 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-06-05 18:18:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:16,116 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-06-05 18:18:16,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 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 18:18:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-06-05 18:18:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:16,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:16,117 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:16,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:16,318 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:16,318 INFO L82 PathProgramCache]: Analyzing trace with hash -856233782, now seen corresponding path program 52 times [2021-06-05 18:18:16,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:16,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277549572] [2021-06-05 18:18:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:16,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277549572] [2021-06-05 18:18:16,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277549572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:16,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930794795] [2021-06-05 18:18:16,416 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:16,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:16,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:16,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:16,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930794795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:16,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:16,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-05 18:18:16,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175993786] [2021-06-05 18:18:16,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 18:18:16,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:16,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 18:18:16,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-05 18:18:16,566 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 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 18:18:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:16,916 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-06-05 18:18:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:16,916 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 80 [2021-06-05 18:18:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:16,921 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 18:18:16,921 INFO L226 Difference]: Without dead ends: 3638 [2021-06-05 18:18:16,921 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-06-05 18:18:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-06-05 18:18:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 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 18:18:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-06-05 18:18:16,963 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-06-05 18:18:16,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:16,963 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-06-05 18:18:16,963 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 18:18:16,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-06-05 18:18:16,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-06-05 18:18:16,966 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:16,966 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:17,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:17,181 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash -833890532, now seen corresponding path program 53 times [2021-06-05 18:18:17,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:17,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540529361] [2021-06-05 18:18:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:17,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:17,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540529361] [2021-06-05 18:18:17,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540529361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:17,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613592628] [2021-06-05 18:18:17,282 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:17,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:18:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 18:18:17,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:17,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613592628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:17,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:17,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 18:18:17,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383819799] [2021-06-05 18:18:17,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:17,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:17,497 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:18:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:17,980 INFO L93 Difference]: Finished difference Result 3851 states and 10341 transitions. [2021-06-05 18:18:17,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:17,980 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 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 80 [2021-06-05 18:18:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:17,983 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 18:18:17,983 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 18:18:17,983 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 447.1ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:17,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 18:18:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 18:18:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:18,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:18,007 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-06-05 18:18:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:18,007 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:18,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 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 18:18:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:18,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:18,009 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:18,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:18,210 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 498592931, now seen corresponding path program 54 times [2021-06-05 18:18:18,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:18,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590699046] [2021-06-05 18:18:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:18,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:18,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:18,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590699046] [2021-06-05 18:18:18,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590699046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:18,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015079081] [2021-06-05 18:18:18,327 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:18,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:18:18,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:18,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:18,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:18,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015079081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:18,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:18,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:18:18,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674657622] [2021-06-05 18:18:18,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:18,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:18,525 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:18,771 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 18:18:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:18:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:18,774 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:18:18,774 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:18:18,775 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 252.7ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:18:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:18:18,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 18:18:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:18,810 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:18,810 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:18,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:18,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:18,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:18,812 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:18,812 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:19,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 18:18:19,012 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:19,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:19,013 INFO L82 PathProgramCache]: Analyzing trace with hash -401461869, now seen corresponding path program 55 times [2021-06-05 18:18:19,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:19,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245497684] [2021-06-05 18:18:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:19,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:19,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245497684] [2021-06-05 18:18:19,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245497684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:19,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001516674] [2021-06-05 18:18:19,155 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:19,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:19,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:19,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001516674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:19,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:19,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:19,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781299336] [2021-06-05 18:18:19,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:19,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:19,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:19,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:19,373 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:19,708 INFO L93 Difference]: Finished difference Result 3641 states and 9487 transitions. [2021-06-05 18:18:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:19,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:19,712 INFO L225 Difference]: With dead ends: 3641 [2021-06-05 18:18:19,712 INFO L226 Difference]: Without dead ends: 3371 [2021-06-05 18:18:19,712 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:19,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-06-05 18:18:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-06-05 18:18:19,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:19,736 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:19,736 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:19,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:19,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:19,738 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:19,738 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:19,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:19,938 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash -830526175, now seen corresponding path program 56 times [2021-06-05 18:18:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:19,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256227674] [2021-06-05 18:18:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:20,061 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:20,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256227674] [2021-06-05 18:18:20,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256227674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:20,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191863902] [2021-06-05 18:18:20,062 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:20,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:20,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:20,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:20,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:20,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191863902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:20,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:20,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:18:20,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324207284] [2021-06-05 18:18:20,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:20,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:20,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:20,254 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:20,529 INFO L93 Difference]: Finished difference Result 3596 states and 9397 transitions. [2021-06-05 18:18:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:20,532 INFO L225 Difference]: With dead ends: 3596 [2021-06-05 18:18:20,532 INFO L226 Difference]: Without dead ends: 3326 [2021-06-05 18:18:20,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 288.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:20,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-06-05 18:18:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-06-05 18:18:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:20,555 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:20,556 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:20,556 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:20,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:20,557 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:20,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 18:18:20,758 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1516709359, now seen corresponding path program 57 times [2021-06-05 18:18:20,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:20,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333533377] [2021-06-05 18:18:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:20,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:20,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333533377] [2021-06-05 18:18:20,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333533377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:20,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123095580] [2021-06-05 18:18:20,876 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:20,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:18:20,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:20,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:18:20,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:21,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123095580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:21,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:21,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:21,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267051218] [2021-06-05 18:18:21,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:21,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:21,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:21,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:21,089 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:21,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:21,419 INFO L93 Difference]: Finished difference Result 3546 states and 9297 transitions. [2021-06-05 18:18:21,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:21,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:21,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:21,422 INFO L225 Difference]: With dead ends: 3546 [2021-06-05 18:18:21,422 INFO L226 Difference]: Without dead ends: 3276 [2021-06-05 18:18:21,422 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 332.9ms TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:18:21,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-06-05 18:18:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-06-05 18:18:21,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:21,445 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:21,445 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:21,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:21,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:21,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:21,448 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:21,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:21,665 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:21,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:21,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1601744097, now seen corresponding path program 58 times [2021-06-05 18:18:21,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:21,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422240072] [2021-06-05 18:18:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:21,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:21,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422240072] [2021-06-05 18:18:21,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422240072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:21,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736836603] [2021-06-05 18:18:21,777 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:21,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:21,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:21,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:21,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:21,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736836603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:21,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:21,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:18:21,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631835585] [2021-06-05 18:18:21,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:21,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:21,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:21,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:21,953 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:22,243 INFO L93 Difference]: Finished difference Result 3496 states and 9197 transitions. [2021-06-05 18:18:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:22,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:22,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:22,246 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 18:18:22,246 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 18:18:22,246 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:18:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 18:18:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 18:18:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:22,272 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:22,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:22,272 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:22,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:22,272 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:22,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:22,274 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:22,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:22,474 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1669895153, now seen corresponding path program 59 times [2021-06-05 18:18:22,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:22,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342935488] [2021-06-05 18:18:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:22,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:22,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:22,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342935488] [2021-06-05 18:18:22,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342935488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:22,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330112893] [2021-06-05 18:18:22,600 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:22,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 18:18:22,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:22,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:22,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330112893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:22,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:22,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:22,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446554318] [2021-06-05 18:18:22,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:22,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:22,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:22,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:22,777 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:23,156 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-06-05 18:18:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:23,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:23,159 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:18:23,159 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:18:23,159 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 382.4ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:18:23,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-06-05 18:18:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:23,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:23,183 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:23,184 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:23,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:23,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:23,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:23,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:23,186 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:23,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:23,386 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:23,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:23,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1328103069, now seen corresponding path program 60 times [2021-06-05 18:18:23,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:23,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369154646] [2021-06-05 18:18:23,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:23,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:23,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369154646] [2021-06-05 18:18:23,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369154646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:23,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671585497] [2021-06-05 18:18:23,486 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:23,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 18:18:23,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:23,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:23,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:23,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671585497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:23,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:23,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:18:23,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311912910] [2021-06-05 18:18:23,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:23,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:23,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:23,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:23,669 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:23,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:23,999 INFO L93 Difference]: Finished difference Result 3396 states and 8997 transitions. [2021-06-05 18:18:23,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:23,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:24,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:24,003 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 18:18:24,003 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 18:18:24,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:24,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 18:18:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-06-05 18:18:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 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 18:18:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-06-05 18:18:24,038 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-06-05 18:18:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:24,039 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-06-05 18:18:24,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-06-05 18:18:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:24,041 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:24,041 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:24,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:24,257 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1757856653, now seen corresponding path program 61 times [2021-06-05 18:18:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:24,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510721005] [2021-06-05 18:18:24,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:24,351 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:24,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:24,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510721005] [2021-06-05 18:18:24,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510721005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:24,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460586685] [2021-06-05 18:18:24,351 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:24,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 18:18:24,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:24,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460586685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:24,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:24,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:24,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939212496] [2021-06-05 18:18:24,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:24,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:24,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:24,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:24,532 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:24,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:24,982 INFO L93 Difference]: Finished difference Result 3406 states and 9047 transitions. [2021-06-05 18:18:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:24,982 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:24,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:24,985 INFO L225 Difference]: With dead ends: 3406 [2021-06-05 18:18:24,985 INFO L226 Difference]: Without dead ends: 3136 [2021-06-05 18:18:24,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-06-05 18:18:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-06-05 18:18:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 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 18:18:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-06-05 18:18:25,009 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-06-05 18:18:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:25,009 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-06-05 18:18:25,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 18:18:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-06-05 18:18:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:25,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:25,012 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:25,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 18:18:25,235 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:25,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:25,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1700122523, now seen corresponding path program 62 times [2021-06-05 18:18:25,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:25,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544649451] [2021-06-05 18:18:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:25,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:25,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544649451] [2021-06-05 18:18:25,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544649451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:25,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030420190] [2021-06-05 18:18:25,340 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:25,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:25,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:25,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:25,533 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:25,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030420190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:25,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:25,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 18:18:25,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503840046] [2021-06-05 18:18:25,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 18:18:25,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 18:18:25,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 18:18:25,535 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:25,890 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-06-05 18:18:25,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:25,894 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 18:18:25,894 INFO L226 Difference]: Without dead ends: 3878 [2021-06-05 18:18:25,895 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 327.0ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:25,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-06-05 18:18:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-06-05 18:18:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 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 18:18:25,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-06-05 18:18:25,923 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-06-05 18:18:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:25,923 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-06-05 18:18:25,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 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 18:18:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-06-05 18:18:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-06-05 18:18:25,925 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:25,925 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:26,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:26,126 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:26,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:26,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1722465773, now seen corresponding path program 63 times [2021-06-05 18:18:26,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:26,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299914485] [2021-06-05 18:18:26,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:26,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:26,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:26,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299914485] [2021-06-05 18:18:26,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299914485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:26,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508642888] [2021-06-05 18:18:26,237 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:26,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 18:18:26,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:26,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:26,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508642888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:26,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:26,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 18:18:26,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176008610] [2021-06-05 18:18:26,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:26,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:26,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:26,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:26,455 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 18:18:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:26,982 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-06-05 18:18:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 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 85 [2021-06-05 18:18:26,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:26,985 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 18:18:26,986 INFO L226 Difference]: Without dead ends: 3441 [2021-06-05 18:18:26,986 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:26,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-06-05 18:18:27,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-06-05 18:18:27,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 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 18:18:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-06-05 18:18:27,006 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-06-05 18:18:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:27,006 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-06-05 18:18:27,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 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 18:18:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-06-05 18:18:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:27,007 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:27,007 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:27,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:27,209 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:27,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:27,209 INFO L82 PathProgramCache]: Analyzing trace with hash -750339617, now seen corresponding path program 64 times [2021-06-05 18:18:27,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:27,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231855990] [2021-06-05 18:18:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:27,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:27,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231855990] [2021-06-05 18:18:27,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231855990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:27,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557911816] [2021-06-05 18:18:27,367 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:27,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:27,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:27,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:27,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:27,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557911816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:27,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:27,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-06-05 18:18:27,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68938528] [2021-06-05 18:18:27,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:18:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:27,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:18:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:18:27,619 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 18:18:27,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:27,921 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-06-05 18:18:27,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:27,922 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:27,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:27,924 INFO L225 Difference]: With dead ends: 2864 [2021-06-05 18:18:27,925 INFO L226 Difference]: Without dead ends: 2530 [2021-06-05 18:18:27,925 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:27,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-06-05 18:18:27,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-06-05 18:18:27,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 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 18:18:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-06-05 18:18:27,943 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-06-05 18:18:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:27,943 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-06-05 18:18:27,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 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 18:18:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-06-05 18:18:27,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:27,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:27,945 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:28,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 18:18:28,146 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:28,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1583179645, now seen corresponding path program 65 times [2021-06-05 18:18:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:28,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409726301] [2021-06-05 18:18:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:28,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:28,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409726301] [2021-06-05 18:18:28,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409726301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:28,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302460604] [2021-06-05 18:18:28,284 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:28,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:28,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:28,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:28,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302460604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:28,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:28,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:28,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097520285] [2021-06-05 18:18:28,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:28,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:28,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:28,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:28,467 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:28,674 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-06-05 18:18:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 18:18:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:28,678 INFO L225 Difference]: With dead ends: 3386 [2021-06-05 18:18:28,678 INFO L226 Difference]: Without dead ends: 3116 [2021-06-05 18:18:28,678 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 18:18:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-06-05 18:18:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-06-05 18:18:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 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 18:18:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-06-05 18:18:28,699 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-06-05 18:18:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:28,711 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-06-05 18:18:28,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-06-05 18:18:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:28,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:28,713 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:28,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:28,914 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:28,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:28,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2037093005, now seen corresponding path program 66 times [2021-06-05 18:18:28,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:28,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190105569] [2021-06-05 18:18:28,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:29,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:29,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190105569] [2021-06-05 18:18:29,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190105569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:29,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641363719] [2021-06-05 18:18:29,073 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:29,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:29,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:29,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:29,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641363719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:29,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:29,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:18:29,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916868179] [2021-06-05 18:18:29,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:29,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:29,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:29,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:29,279 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:29,580 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-06-05 18:18:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 90 [2021-06-05 18:18:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:29,583 INFO L225 Difference]: With dead ends: 3346 [2021-06-05 18:18:29,583 INFO L226 Difference]: Without dead ends: 3076 [2021-06-05 18:18:29,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:18:29,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-06-05 18:18:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-06-05 18:18:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 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 18:18:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-06-05 18:18:29,606 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-06-05 18:18:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:29,606 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-06-05 18:18:29,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-06-05 18:18:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:29,607 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:29,608 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:29,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 18:18:29,808 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1159081087, now seen corresponding path program 67 times [2021-06-05 18:18:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:29,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774885073] [2021-06-05 18:18:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:29,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:29,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:29,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774885073] [2021-06-05 18:18:29,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774885073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:29,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528730941] [2021-06-05 18:18:29,939 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:29,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:30,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528730941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:30,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:30,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:30,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679419066] [2021-06-05 18:18:30,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:30,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:30,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:30,127 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:30,392 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-06-05 18:18:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 18:18:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:30,395 INFO L225 Difference]: With dead ends: 3396 [2021-06-05 18:18:30,395 INFO L226 Difference]: Without dead ends: 3126 [2021-06-05 18:18:30,396 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 18:18:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-06-05 18:18:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-06-05 18:18:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 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 18:18:30,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-06-05 18:18:30,417 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-06-05 18:18:30,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:30,417 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-06-05 18:18:30,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-06-05 18:18:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:30,418 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:30,418 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:30,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 18:18:30,620 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:30,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:30,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2059135887, now seen corresponding path program 68 times [2021-06-05 18:18:30,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:30,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055930273] [2021-06-05 18:18:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:30,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055930273] [2021-06-05 18:18:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055930273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:30,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337911025] [2021-06-05 18:18:30,780 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:30,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:30,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:31,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337911025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:31,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:18:31,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604551817] [2021-06-05 18:18:31,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:31,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:31,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:31,012 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:31,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:31,351 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-06-05 18:18:31,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:31,351 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 90 [2021-06-05 18:18:31,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:31,354 INFO L225 Difference]: With dead ends: 3421 [2021-06-05 18:18:31,354 INFO L226 Difference]: Without dead ends: 3151 [2021-06-05 18:18:31,354 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:31,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-06-05 18:18:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-06-05 18:18:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 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 18:18:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-06-05 18:18:31,376 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-06-05 18:18:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:31,376 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-06-05 18:18:31,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-06-05 18:18:31,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:31,378 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:31,378 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:31,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:31,578 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:31,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:31,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1806767103, now seen corresponding path program 69 times [2021-06-05 18:18:31,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:31,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716372625] [2021-06-05 18:18:31,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:31,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:31,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716372625] [2021-06-05 18:18:31,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716372625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763416342] [2021-06-05 18:18:31,708 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:31,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:31,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:18:31,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:31,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763416342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:31,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:31,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:31,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627106873] [2021-06-05 18:18:31,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:31,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:31,903 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:32,194 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-06-05 18:18:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:32,194 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:32,198 INFO L225 Difference]: With dead ends: 3446 [2021-06-05 18:18:32,198 INFO L226 Difference]: Without dead ends: 3176 [2021-06-05 18:18:32,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 18:18:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-06-05 18:18:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-06-05 18:18:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 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 18:18:32,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-06-05 18:18:32,224 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-06-05 18:18:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:32,225 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-06-05 18:18:32,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-06-05 18:18:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:32,226 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:32,226 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:32,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:32,427 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:32,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:32,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1120583919, now seen corresponding path program 70 times [2021-06-05 18:18:32,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:32,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826905562] [2021-06-05 18:18:32,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:32,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826905562] [2021-06-05 18:18:32,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826905562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303575937] [2021-06-05 18:18:32,564 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:32,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:32,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:32,809 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:32,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303575937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:32,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:32,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:18:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695684834] [2021-06-05 18:18:32,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:32,810 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:33,233 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-06-05 18:18:33,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:33,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 90 [2021-06-05 18:18:33,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:33,236 INFO L225 Difference]: With dead ends: 3471 [2021-06-05 18:18:33,236 INFO L226 Difference]: Without dead ends: 3201 [2021-06-05 18:18:33,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:33,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-06-05 18:18:33,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-06-05 18:18:33,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 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 18:18:33,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-06-05 18:18:33,262 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-06-05 18:18:33,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:33,262 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-06-05 18:18:33,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:33,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-06-05 18:18:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:33,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:33,264 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:33,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:33,465 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:33,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:33,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1035549181, now seen corresponding path program 71 times [2021-06-05 18:18:33,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:33,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173329995] [2021-06-05 18:18:33,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:33,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:33,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173329995] [2021-06-05 18:18:33,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173329995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:33,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620605317] [2021-06-05 18:18:33,594 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:33,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:33,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:33,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:33,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:33,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620605317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:33,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:33,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:33,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777439872] [2021-06-05 18:18:33,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:33,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:33,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:33,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:33,787 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:34,102 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-06-05 18:18:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:34,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:34,106 INFO L225 Difference]: With dead ends: 3496 [2021-06-05 18:18:34,106 INFO L226 Difference]: Without dead ends: 3226 [2021-06-05 18:18:34,106 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:34,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-06-05 18:18:34,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-06-05 18:18:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 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 18:18:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-06-05 18:18:34,136 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-06-05 18:18:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:34,136 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-06-05 18:18:34,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-06-05 18:18:34,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:34,138 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:34,138 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:34,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:34,339 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:34,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:34,339 INFO L82 PathProgramCache]: Analyzing trace with hash 967398125, now seen corresponding path program 72 times [2021-06-05 18:18:34,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:34,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336164287] [2021-06-05 18:18:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:34,470 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:34,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336164287] [2021-06-05 18:18:34,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336164287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:34,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271422454] [2021-06-05 18:18:34,471 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:34,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:34,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:34,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271422454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:34,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:34,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:18:34,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208880383] [2021-06-05 18:18:34,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:34,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:34,707 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:35,159 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-06-05 18:18:35,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:35,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 90 [2021-06-05 18:18:35,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:35,163 INFO L225 Difference]: With dead ends: 3521 [2021-06-05 18:18:35,163 INFO L226 Difference]: Without dead ends: 3251 [2021-06-05 18:18:35,163 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=443, Invalid=1363, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-06-05 18:18:35,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-06-05 18:18:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 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 18:18:35,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-06-05 18:18:35,191 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-06-05 18:18:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:35,191 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-06-05 18:18:35,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:35,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-06-05 18:18:35,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:35,193 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:35,193 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:35,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:35,394 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash -329570949, now seen corresponding path program 73 times [2021-06-05 18:18:35,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:35,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803712311] [2021-06-05 18:18:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:35,507 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:35,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803712311] [2021-06-05 18:18:35,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803712311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:35,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786519354] [2021-06-05 18:18:35,507 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:35,682 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:35,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786519354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:35,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:35,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:35,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627440550] [2021-06-05 18:18:35,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:35,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:35,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:35,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:35,683 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:36,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:36,058 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-06-05 18:18:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:36,062 INFO L225 Difference]: With dead ends: 3591 [2021-06-05 18:18:36,062 INFO L226 Difference]: Without dead ends: 3321 [2021-06-05 18:18:36,062 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 346.2ms TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-06-05 18:18:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-06-05 18:18:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 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 18:18:36,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-06-05 18:18:36,092 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-06-05 18:18:36,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:36,092 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-06-05 18:18:36,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:36,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-06-05 18:18:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:36,094 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:36,094 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:36,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 18:18:36,295 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 100182635, now seen corresponding path program 74 times [2021-06-05 18:18:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006277714] [2021-06-05 18:18:36,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:36,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:36,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006277714] [2021-06-05 18:18:36,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006277714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:36,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632721552] [2021-06-05 18:18:36,403 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:36,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:36,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:36,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:36,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:36,601 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:36,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632721552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:36,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:36,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-06-05 18:18:36,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676274873] [2021-06-05 18:18:36,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:36,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:36,602 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:37,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:37,178 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-06-05 18:18:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:37,178 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 90 [2021-06-05 18:18:37,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:37,182 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 18:18:37,182 INFO L226 Difference]: Without dead ends: 3546 [2021-06-05 18:18:37,182 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-06-05 18:18:37,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-06-05 18:18:37,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 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 18:18:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-06-05 18:18:37,211 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-06-05 18:18:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:37,211 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-06-05 18:18:37,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 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 18:18:37,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-06-05 18:18:37,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:37,214 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:37,214 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:37,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:37,414 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:37,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:37,415 INFO L82 PathProgramCache]: Analyzing trace with hash 42448505, now seen corresponding path program 75 times [2021-06-05 18:18:37,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:37,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546211144] [2021-06-05 18:18:37,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:37,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:37,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546211144] [2021-06-05 18:18:37,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546211144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:37,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96380367] [2021-06-05 18:18:37,517 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:37,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:37,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:37,693 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:37,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96380367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:37,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:37,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:37,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080899461] [2021-06-05 18:18:37,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:37,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:37,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:37,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:37,694 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:38,090 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-06-05 18:18:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:38,095 INFO L225 Difference]: With dead ends: 4398 [2021-06-05 18:18:38,095 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 18:18:38,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 18:18:38,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-06-05 18:18:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 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 18:18:38,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-06-05 18:18:38,130 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-06-05 18:18:38,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:38,130 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-06-05 18:18:38,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-06-05 18:18:38,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-06-05 18:18:38,132 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:38,132 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:38,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:38,333 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:38,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:38,333 INFO L82 PathProgramCache]: Analyzing trace with hash 64791755, now seen corresponding path program 76 times [2021-06-05 18:18:38,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:38,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442149779] [2021-06-05 18:18:38,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:38,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442149779] [2021-06-05 18:18:38,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442149779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:38,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643965984] [2021-06-05 18:18:38,440 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:38,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:38,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:38,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 18:18:38,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:38,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643965984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:38,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:38,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 18:18:38,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936512542] [2021-06-05 18:18:38,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:38,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:38,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:38,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:38,631 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:39,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:39,129 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-06-05 18:18:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 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 90 [2021-06-05 18:18:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:39,133 INFO L225 Difference]: With dead ends: 3885 [2021-06-05 18:18:39,133 INFO L226 Difference]: Without dead ends: 3306 [2021-06-05 18:18:39,133 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:18:39,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-06-05 18:18:39,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-06-05 18:18:39,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 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 18:18:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-06-05 18:18:39,155 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-06-05 18:18:39,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:39,156 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-06-05 18:18:39,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 18:18:39,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-06-05 18:18:39,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:39,157 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:39,157 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:39,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 18:18:39,358 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:39,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:39,358 INFO L82 PathProgramCache]: Analyzing trace with hash -472912364, now seen corresponding path program 77 times [2021-06-05 18:18:39,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:39,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37346057] [2021-06-05 18:18:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:39,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:39,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37346057] [2021-06-05 18:18:39,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37346057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:39,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934281211] [2021-06-05 18:18:39,504 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:39,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:39,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:39,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934281211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:39,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:39,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:39,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848013874] [2021-06-05 18:18:39,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:39,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:39,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:39,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:39,719 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:39,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:39,989 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-06-05 18:18:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:18:39,989 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-06-05 18:18:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:39,992 INFO L225 Difference]: With dead ends: 3131 [2021-06-05 18:18:39,992 INFO L226 Difference]: Without dead ends: 2861 [2021-06-05 18:18:39,992 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:39,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-06-05 18:18:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-06-05 18:18:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 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 18:18:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-06-05 18:18:40,014 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-06-05 18:18:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:40,014 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-06-05 18:18:40,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-06-05 18:18:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:40,016 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:40,016 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:40,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:40,217 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash -926825724, now seen corresponding path program 78 times [2021-06-05 18:18:40,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:40,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348200378] [2021-06-05 18:18:40,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:40,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:40,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348200378] [2021-06-05 18:18:40,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348200378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:40,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230713218] [2021-06-05 18:18:40,364 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:40,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:40,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:40,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:40,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:40,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230713218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:40,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:40,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:40,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738320116] [2021-06-05 18:18:40,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:40,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:40,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:40,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:40,582 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:40,915 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-06-05 18:18:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:40,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-06-05 18:18:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:40,919 INFO L225 Difference]: With dead ends: 3451 [2021-06-05 18:18:40,919 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 18:18:40,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 345.8ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 18:18:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-06-05 18:18:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 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 18:18:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-06-05 18:18:40,941 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-06-05 18:18:40,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:40,941 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-06-05 18:18:40,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-06-05 18:18:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:40,943 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:40,943 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:41,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:41,144 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:41,144 INFO L82 PathProgramCache]: Analyzing trace with hash -48813806, now seen corresponding path program 79 times [2021-06-05 18:18:41,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:41,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284878540] [2021-06-05 18:18:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:41,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:41,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284878540] [2021-06-05 18:18:41,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284878540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:41,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314147552] [2021-06-05 18:18:41,286 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:41,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314147552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:41,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:41,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:41,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47652672] [2021-06-05 18:18:41,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:41,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:41,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:41,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:41,482 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:41,811 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-06-05 18:18:41,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-06-05 18:18:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:41,814 INFO L225 Difference]: With dead ends: 3481 [2021-06-05 18:18:41,814 INFO L226 Difference]: Without dead ends: 3211 [2021-06-05 18:18:41,814 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 18:18:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-06-05 18:18:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-06-05 18:18:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 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 18:18:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-06-05 18:18:41,837 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-06-05 18:18:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:41,838 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-06-05 18:18:41,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-06-05 18:18:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:41,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:41,839 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:42,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:42,040 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:42,043 INFO L82 PathProgramCache]: Analyzing trace with hash -948868606, now seen corresponding path program 80 times [2021-06-05 18:18:42,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:42,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021221940] [2021-06-05 18:18:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:42,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:42,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:42,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021221940] [2021-06-05 18:18:42,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021221940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:42,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515294844] [2021-06-05 18:18:42,182 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:42,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:42,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:42,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:42,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:42,399 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:42,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515294844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:42,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:42,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:42,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082973724] [2021-06-05 18:18:42,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:42,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:42,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:42,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:42,400 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:42,783 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-06-05 18:18:42,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:18:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-06-05 18:18:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:42,786 INFO L225 Difference]: With dead ends: 3506 [2021-06-05 18:18:42,786 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 18:18:42,786 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 374.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:42,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 18:18:42,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-06-05 18:18:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 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 18:18:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-06-05 18:18:42,809 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-06-05 18:18:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:42,810 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-06-05 18:18:42,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-06-05 18:18:42,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:42,811 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:42,811 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:43,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 18:18:43,012 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:43,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:43,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1377932912, now seen corresponding path program 81 times [2021-06-05 18:18:43,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:43,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196349344] [2021-06-05 18:18:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:43,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:43,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196349344] [2021-06-05 18:18:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196349344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:43,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894119993] [2021-06-05 18:18:43,130 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:43,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:43,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:18:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:43,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894119993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:43,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:43,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:43,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246721437] [2021-06-05 18:18:43,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:43,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:43,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:43,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:43,327 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:43,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:43,693 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-06-05 18:18:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:43,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-06-05 18:18:43,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:43,696 INFO L225 Difference]: With dead ends: 3531 [2021-06-05 18:18:43,696 INFO L226 Difference]: Without dead ends: 3261 [2021-06-05 18:18:43,696 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 344.5ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:18:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-06-05 18:18:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-06-05 18:18:43,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 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 18:18:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-06-05 18:18:43,721 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-06-05 18:18:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:43,721 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-06-05 18:18:43,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-06-05 18:18:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:43,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:43,723 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:43,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:43,923 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2064116096, now seen corresponding path program 82 times [2021-06-05 18:18:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:43,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635119850] [2021-06-05 18:18:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:44,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:44,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635119850] [2021-06-05 18:18:44,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635119850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:44,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496247182] [2021-06-05 18:18:44,062 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:44,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:44,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:44,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:44,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496247182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:44,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:44,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:44,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470474604] [2021-06-05 18:18:44,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:44,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:44,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:44,256 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:44,684 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-06-05 18:18:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:44,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-06-05 18:18:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:44,688 INFO L225 Difference]: With dead ends: 3556 [2021-06-05 18:18:44,688 INFO L226 Difference]: Without dead ends: 3286 [2021-06-05 18:18:44,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-06-05 18:18:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-06-05 18:18:44,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 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 18:18:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-06-05 18:18:44,714 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-06-05 18:18:44,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:44,714 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-06-05 18:18:44,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:44,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-06-05 18:18:44,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:44,715 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:44,716 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:44,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 18:18:44,917 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2145816462, now seen corresponding path program 83 times [2021-06-05 18:18:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326127107] [2021-06-05 18:18:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:45,049 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:45,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:45,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326127107] [2021-06-05 18:18:45,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326127107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:45,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381560643] [2021-06-05 18:18:45,050 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:45,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 18:18:45,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:45,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381560643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:45,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:45,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:45,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532793336] [2021-06-05 18:18:45,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:45,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:45,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:45,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:45,225 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:45,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:45,588 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-06-05 18:18:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:18:45,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-06-05 18:18:45,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:45,591 INFO L225 Difference]: With dead ends: 3581 [2021-06-05 18:18:45,591 INFO L226 Difference]: Without dead ends: 3311 [2021-06-05 18:18:45,592 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:18:45,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-06-05 18:18:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-06-05 18:18:45,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 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 18:18:45,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-06-05 18:18:45,618 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-06-05 18:18:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:45,618 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-06-05 18:18:45,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:45,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-06-05 18:18:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:45,620 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:45,620 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:45,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-06-05 18:18:45,822 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:45,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:45,822 INFO L82 PathProgramCache]: Analyzing trace with hash 2077665406, now seen corresponding path program 84 times [2021-06-05 18:18:45,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:45,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331367974] [2021-06-05 18:18:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:45,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331367974] [2021-06-05 18:18:45,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331367974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:45,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145688567] [2021-06-05 18:18:45,949 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:46,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 18:18:46,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:46,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:46,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:46,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145688567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:46,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:46,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:46,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438204505] [2021-06-05 18:18:46,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:46,130 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:46,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:46,605 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-06-05 18:18:46,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:46,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-06-05 18:18:46,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:46,609 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:18:46,609 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:18:46,609 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:18:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-06-05 18:18:46,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 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 18:18:46,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-06-05 18:18:46,637 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-06-05 18:18:46,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:46,637 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-06-05 18:18:46,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-06-05 18:18:46,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:46,639 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:46,639 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:46,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:46,839 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:46,840 INFO L82 PathProgramCache]: Analyzing trace with hash 780696332, now seen corresponding path program 85 times [2021-06-05 18:18:46,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:46,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344255352] [2021-06-05 18:18:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:46,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:46,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:46,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344255352] [2021-06-05 18:18:46,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344255352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:46,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477427710] [2021-06-05 18:18:46,953 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:47,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:47,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477427710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:47,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:47,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:47,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528450605] [2021-06-05 18:18:47,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:47,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:47,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:47,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:47,119 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:47,513 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-06-05 18:18:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:18:47,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-06-05 18:18:47,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:47,517 INFO L225 Difference]: With dead ends: 3631 [2021-06-05 18:18:47,517 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 18:18:47,517 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:18:47,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 18:18:47,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-06-05 18:18:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 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 18:18:47,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-06-05 18:18:47,555 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-06-05 18:18:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:47,555 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-06-05 18:18:47,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:47,555 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-06-05 18:18:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:47,557 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:47,557 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:47,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:47,758 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:47,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:47,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1210449916, now seen corresponding path program 86 times [2021-06-05 18:18:47,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:47,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084891213] [2021-06-05 18:18:47,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:47,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084891213] [2021-06-05 18:18:47,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084891213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977064832] [2021-06-05 18:18:47,873 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:47,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:47,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:47,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:47,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:48,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977064832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:48,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:48,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:48,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163498052] [2021-06-05 18:18:48,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:48,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:48,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:48,057 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:48,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:48,579 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-06-05 18:18:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:18:48,579 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-06-05 18:18:48,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:48,583 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 18:18:48,583 INFO L226 Difference]: Without dead ends: 3446 [2021-06-05 18:18:48,583 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 482.7ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-06-05 18:18:48,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-06-05 18:18:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 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 18:18:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-06-05 18:18:48,614 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-06-05 18:18:48,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:48,614 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-06-05 18:18:48,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:48,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-06-05 18:18:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:48,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:48,616 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:48,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:48,818 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:48,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:48,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1152715786, now seen corresponding path program 87 times [2021-06-05 18:18:48,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:48,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211221418] [2021-06-05 18:18:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:48,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:48,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211221418] [2021-06-05 18:18:48,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211221418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:48,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857902692] [2021-06-05 18:18:48,933 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:48,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 18:18:48,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:48,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:49,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857902692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:49,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:49,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 18:18:49,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880664180] [2021-06-05 18:18:49,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 18:18:49,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:49,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 18:18:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-06-05 18:18:49,103 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:49,550 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-06-05 18:18:49,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:49,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 95 [2021-06-05 18:18:49,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:49,555 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 18:18:49,556 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 18:18:49,556 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:18:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 18:18:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-06-05 18:18:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 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 18:18:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-06-05 18:18:49,592 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-06-05 18:18:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:49,592 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-06-05 18:18:49,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 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 18:18:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-06-05 18:18:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-06-05 18:18:49,594 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:49,594 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:49,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 18:18:49,794 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1175059036, now seen corresponding path program 88 times [2021-06-05 18:18:49,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:49,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469888246] [2021-06-05 18:18:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:49,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:49,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:49,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469888246] [2021-06-05 18:18:49,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469888246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:49,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205779172] [2021-06-05 18:18:49,904 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:49,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:49,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:49,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 18:18:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:50,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205779172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:50,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:50,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 18:18:50,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385681670] [2021-06-05 18:18:50,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:50,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:50,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:50,099 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:50,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:50,627 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-06-05 18:18:50,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:18:50,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 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 95 [2021-06-05 18:18:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:50,630 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 18:18:50,631 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 18:18:50,631 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:18:50,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 18:18:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-06-05 18:18:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 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 18:18:50,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-06-05 18:18:50,653 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-06-05 18:18:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:50,654 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-06-05 18:18:50,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 18:18:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-06-05 18:18:50,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:50,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:50,655 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:50,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 18:18:50,856 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:50,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2003017648, now seen corresponding path program 89 times [2021-06-05 18:18:50,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:50,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842868041] [2021-06-05 18:18:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:51,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:51,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842868041] [2021-06-05 18:18:51,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842868041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:51,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606401802] [2021-06-05 18:18:51,012 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:51,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:18:51,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:51,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:18:51,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606401802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:51,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:51,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:18:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253212340] [2021-06-05 18:18:51,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:18:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:18:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:18:51,245 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 18:18:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:51,575 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-06-05 18:18:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:51,575 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:51,578 INFO L225 Difference]: With dead ends: 3024 [2021-06-05 18:18:51,578 INFO L226 Difference]: Without dead ends: 2690 [2021-06-05 18:18:51,579 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:51,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-06-05 18:18:51,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-06-05 18:18:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 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 18:18:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-06-05 18:18:51,601 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-06-05 18:18:51,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:51,601 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-06-05 18:18:51,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 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 18:18:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-06-05 18:18:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:51,603 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:51,603 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:51,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 18:18:51,804 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:51,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:51,805 INFO L82 PathProgramCache]: Analyzing trace with hash 381501940, now seen corresponding path program 90 times [2021-06-05 18:18:51,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:51,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862115874] [2021-06-05 18:18:51,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:51,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:51,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862115874] [2021-06-05 18:18:51,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862115874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:51,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750823473] [2021-06-05 18:18:51,985 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:52,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:18:52,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:52,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:52,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750823473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:52,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:52,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:18:52,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254393798] [2021-06-05 18:18:52,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:52,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:52,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:52,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:52,201 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:52,453 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-06-05 18:18:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 18:18:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:52,457 INFO L225 Difference]: With dead ends: 3646 [2021-06-05 18:18:52,457 INFO L226 Difference]: Without dead ends: 3376 [2021-06-05 18:18:52,457 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 18:18:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-06-05 18:18:52,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-06-05 18:18:52,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 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 18:18:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-06-05 18:18:52,481 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-06-05 18:18:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:52,482 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-06-05 18:18:52,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:52,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-06-05 18:18:52,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:52,483 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:52,483 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:52,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 18:18:52,684 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:52,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1021160164, now seen corresponding path program 91 times [2021-06-05 18:18:52,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:52,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462110658] [2021-06-05 18:18:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:52,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462110658] [2021-06-05 18:18:52,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462110658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:52,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873834929] [2021-06-05 18:18:52,845 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:52,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:52,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:53,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873834929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:53,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:53,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:53,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569412125] [2021-06-05 18:18:53,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:53,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:53,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:53,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:53,056 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:53,392 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-06-05 18:18:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:53,395 INFO L225 Difference]: With dead ends: 3606 [2021-06-05 18:18:53,395 INFO L226 Difference]: Without dead ends: 3336 [2021-06-05 18:18:53,395 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 372.1ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-06-05 18:18:53,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-06-05 18:18:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 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 18:18:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-06-05 18:18:53,421 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-06-05 18:18:53,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:53,421 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-06-05 18:18:53,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:53,421 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-06-05 18:18:53,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:53,422 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:53,422 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:53,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 18:18:53,623 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:53,623 INFO L82 PathProgramCache]: Analyzing trace with hash 246241138, now seen corresponding path program 92 times [2021-06-05 18:18:53,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:53,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650253559] [2021-06-05 18:18:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:53,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:53,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650253559] [2021-06-05 18:18:53,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650253559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:53,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929140367] [2021-06-05 18:18:53,785 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:53,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:53,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:53,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:53,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:53,967 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:53,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929140367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:53,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:53,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:18:53,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853171988] [2021-06-05 18:18:53,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:53,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:53,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:53,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:53,968 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:54,259 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-06-05 18:18:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 18:18:54,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:54,262 INFO L225 Difference]: With dead ends: 3656 [2021-06-05 18:18:54,262 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 18:18:54,263 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 18:18:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 18:18:54,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-06-05 18:18:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 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 18:18:54,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-06-05 18:18:54,287 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-06-05 18:18:54,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:54,287 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-06-05 18:18:54,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:54,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-06-05 18:18:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:54,289 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:54,289 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:54,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 18:18:54,489 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash -207672222, now seen corresponding path program 93 times [2021-06-05 18:18:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:54,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257770016] [2021-06-05 18:18:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:54,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:54,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257770016] [2021-06-05 18:18:54,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257770016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:54,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282113430] [2021-06-05 18:18:54,644 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:54,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:18:54,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:54,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 18:18:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:54,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282113430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:54,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:54,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:54,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781541155] [2021-06-05 18:18:54,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:54,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:54,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:54,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:54,841 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:55,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:55,196 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-06-05 18:18:55,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:18:55,196 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:55,199 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 18:18:55,199 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 18:18:55,200 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=359, Invalid=1201, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:55,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 18:18:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-06-05 18:18:55,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 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 18:18:55,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-06-05 18:18:55,225 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-06-05 18:18:55,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:55,225 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-06-05 18:18:55,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:55,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-06-05 18:18:55,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:55,227 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:55,227 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:55,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 18:18:55,429 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:55,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:55,429 INFO L82 PathProgramCache]: Analyzing trace with hash 670339696, now seen corresponding path program 94 times [2021-06-05 18:18:55,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:55,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279607146] [2021-06-05 18:18:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:55,575 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:55,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:55,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279607146] [2021-06-05 18:18:55,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279607146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545308215] [2021-06-05 18:18:55,576 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:55,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:18:55,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:55,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:55,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:55,778 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:55,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545308215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:55,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:55,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:18:55,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809205945] [2021-06-05 18:18:55,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:55,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:55,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:55,779 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:56,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:56,124 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-06-05 18:18:56,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:18:56,124 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:56,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:56,127 INFO L225 Difference]: With dead ends: 3706 [2021-06-05 18:18:56,127 INFO L226 Difference]: Without dead ends: 3436 [2021-06-05 18:18:56,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 338.2ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 18:18:56,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-06-05 18:18:56,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-06-05 18:18:56,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 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 18:18:56,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-06-05 18:18:56,158 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-06-05 18:18:56,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:56,158 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-06-05 18:18:56,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:56,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-06-05 18:18:56,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:56,160 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:56,160 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:56,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:56,360 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:56,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash -229715104, now seen corresponding path program 95 times [2021-06-05 18:18:56,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:56,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529397660] [2021-06-05 18:18:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:56,500 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:56,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:56,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529397660] [2021-06-05 18:18:56,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529397660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910773103] [2021-06-05 18:18:56,501 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:56,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:18:56,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:56,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:56,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:56,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910773103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:56,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:56,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:56,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386228749] [2021-06-05 18:18:56,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:56,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:56,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:56,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:56,696 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:57,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:57,124 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-06-05 18:18:57,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:18:57,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:57,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:57,127 INFO L225 Difference]: With dead ends: 3731 [2021-06-05 18:18:57,128 INFO L226 Difference]: Without dead ends: 3461 [2021-06-05 18:18:57,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 421.6ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:18:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-06-05 18:18:57,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-06-05 18:18:57,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 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 18:18:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-06-05 18:18:57,157 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-06-05 18:18:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:57,157 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-06-05 18:18:57,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-06-05 18:18:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:57,159 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:57,160 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:57,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 18:18:57,365 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -658779410, now seen corresponding path program 96 times [2021-06-05 18:18:57,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:57,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461712121] [2021-06-05 18:18:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:57,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:57,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461712121] [2021-06-05 18:18:57,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461712121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:57,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448908512] [2021-06-05 18:18:57,524 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:57,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:18:57,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:57,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:57,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:57,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448908512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:57,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:57,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:18:57,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796284817] [2021-06-05 18:18:57,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:57,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:57,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:57,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:57,700 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:58,060 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-06-05 18:18:58,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:18:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:58,063 INFO L225 Difference]: With dead ends: 3756 [2021-06-05 18:18:58,063 INFO L226 Difference]: Without dead ends: 3486 [2021-06-05 18:18:58,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 371.8ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 18:18:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-06-05 18:18:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-06-05 18:18:58,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 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 18:18:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-06-05 18:18:58,093 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-06-05 18:18:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:58,093 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-06-05 18:18:58,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:18:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-06-05 18:18:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:58,095 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:58,095 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:58,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:58,297 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1344962594, now seen corresponding path program 97 times [2021-06-05 18:18:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223740869] [2021-06-05 18:18:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:58,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223740869] [2021-06-05 18:18:58,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223740869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:58,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978533873] [2021-06-05 18:18:58,445 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:58,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:58,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:58,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978533873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:58,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:58,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:18:58,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166816122] [2021-06-05 18:18:58,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:18:58,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:58,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:18:58,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:18:58,658 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:18:59,137 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-06-05 18:18:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:18:59,137 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-06-05 18:18:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:18:59,141 INFO L225 Difference]: With dead ends: 3781 [2021-06-05 18:18:59,141 INFO L226 Difference]: Without dead ends: 3511 [2021-06-05 18:18:59,141 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:18:59,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-06-05 18:18:59,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-06-05 18:18:59,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 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 18:18:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-06-05 18:18:59,186 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-06-05 18:18:59,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:18:59,186 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-06-05 18:18:59,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:18:59,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-06-05 18:18:59,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:18:59,188 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:18:59,188 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:18:59,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 18:18:59,392 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:18:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:18:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1429997332, now seen corresponding path program 98 times [2021-06-05 18:18:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:18:59,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467199104] [2021-06-05 18:18:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:18:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:18:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:59,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:18:59,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467199104] [2021-06-05 18:18:59,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467199104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:59,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366260045] [2021-06-05 18:18:59,540 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:18:59,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:18:59,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:18:59,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:18:59,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:18:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:18:59,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366260045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:18:59,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:18:59,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:18:59,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714686278] [2021-06-05 18:18:59,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:18:59,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:18:59,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:18:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:18:59,718 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:19:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:00,120 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-06-05 18:19:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:00,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-06-05 18:19:00,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:00,125 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 18:19:00,126 INFO L226 Difference]: Without dead ends: 3536 [2021-06-05 18:19:00,126 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 393.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:00,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-06-05 18:19:00,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-06-05 18:19:00,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 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 18:19:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-06-05 18:19:00,171 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-06-05 18:19:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:00,171 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-06-05 18:19:00,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:19:00,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-06-05 18:19:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:19:00,174 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:00,174 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:00,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:00,393 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:00,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1498148388, now seen corresponding path program 99 times [2021-06-05 18:19:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:00,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049803811] [2021-06-05 18:19:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:00,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:00,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049803811] [2021-06-05 18:19:00,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049803811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:00,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795995422] [2021-06-05 18:19:00,524 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:00,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:19:00,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:00,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:00,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:00,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795995422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:00,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:00,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:19:00,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803619725] [2021-06-05 18:19:00,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:00,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:00,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:00,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:00,715 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:19:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:01,212 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-06-05 18:19:01,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:01,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-06-05 18:19:01,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:01,215 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 18:19:01,215 INFO L226 Difference]: Without dead ends: 3561 [2021-06-05 18:19:01,215 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-06-05 18:19:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-06-05 18:19:01,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 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 18:19:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-06-05 18:19:01,244 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-06-05 18:19:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:01,244 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-06-05 18:19:01,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:19:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-06-05 18:19:01,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:19:01,246 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:01,246 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:01,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 18:19:01,455 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:01,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:01,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1499849834, now seen corresponding path program 100 times [2021-06-05 18:19:01,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:01,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326259007] [2021-06-05 18:19:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:01,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:01,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326259007] [2021-06-05 18:19:01,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326259007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315093425] [2021-06-05 18:19:01,577 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:01,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:01,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:01,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:19:01,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:01,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315093425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:01,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:01,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:19:01,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894713762] [2021-06-05 18:19:01,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:19:01,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:01,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:19:01,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:19:01,777 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:19:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:02,212 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-06-05 18:19:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-06-05 18:19:02,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:02,216 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 18:19:02,216 INFO L226 Difference]: Without dead ends: 3586 [2021-06-05 18:19:02,216 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-06-05 18:19:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-06-05 18:19:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 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 18:19:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-06-05 18:19:02,248 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-06-05 18:19:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:02,248 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-06-05 18:19:02,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:19:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-06-05 18:19:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:19:02,251 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:02,251 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:02,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 18:19:02,451 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:02,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:02,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1929603418, now seen corresponding path program 101 times [2021-06-05 18:19:02,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:02,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340480916] [2021-06-05 18:19:02,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:02,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340480916] [2021-06-05 18:19:02,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340480916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:02,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354959239] [2021-06-05 18:19:02,588 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:02,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:19:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:02,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:19:02,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:02,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354959239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:02,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:02,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-06-05 18:19:02,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675778879] [2021-06-05 18:19:02,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 18:19:02,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:02,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 18:19:02,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 18:19:02,783 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:19:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:03,360 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-06-05 18:19:03,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:03,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 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 100 [2021-06-05 18:19:03,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:03,364 INFO L225 Difference]: With dead ends: 3941 [2021-06-05 18:19:03,364 INFO L226 Difference]: Without dead ends: 3671 [2021-06-05 18:19:03,364 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-06-05 18:19:03,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-06-05 18:19:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 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 18:19:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-06-05 18:19:03,398 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-06-05 18:19:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:03,398 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-06-05 18:19:03,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 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 18:19:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-06-05 18:19:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:19:03,401 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:03,401 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:03,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 18:19:03,601 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:03,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:03,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1871869288, now seen corresponding path program 102 times [2021-06-05 18:19:03,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:03,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215467595] [2021-06-05 18:19:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:03,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215467595] [2021-06-05 18:19:03,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215467595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:03,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742631472] [2021-06-05 18:19:03,719 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:03,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:19:03,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:03,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742631472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:03,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:03,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-06-05 18:19:03,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927416084] [2021-06-05 18:19:03,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 18:19:03,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:03,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 18:19:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-06-05 18:19:03,891 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:19:04,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:04,362 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-06-05 18:19:04,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:04,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-06-05 18:19:04,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:04,366 INFO L225 Difference]: With dead ends: 4708 [2021-06-05 18:19:04,366 INFO L226 Difference]: Without dead ends: 4438 [2021-06-05 18:19:04,367 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-06-05 18:19:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-06-05 18:19:04,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 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 18:19:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-06-05 18:19:04,401 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-06-05 18:19:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:04,401 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-06-05 18:19:04,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 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 18:19:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-06-05 18:19:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-06-05 18:19:04,403 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:04,403 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:04,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:04,604 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1894212538, now seen corresponding path program 103 times [2021-06-05 18:19:04,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:04,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038438387] [2021-06-05 18:19:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:04,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:04,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038438387] [2021-06-05 18:19:04,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038438387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237082251] [2021-06-05 18:19:04,731 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 18:19:04,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:04,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237082251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:04,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:04,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-06-05 18:19:04,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025474691] [2021-06-05 18:19:04,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:04,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:04,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:04,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:04,947 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 18:19:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:05,608 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-06-05 18:19:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:19:05,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 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 100 [2021-06-05 18:19:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:05,613 INFO L225 Difference]: With dead ends: 4651 [2021-06-05 18:19:05,613 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:19:05,613 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 627.2ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:19:05,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:19:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:19:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:05,646 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-06-05 18:19:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:05,646 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:05,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 18:19:05,646 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:05,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:05,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:05,648 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:05,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 18:19:05,849 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:05,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:05,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1987209659, now seen corresponding path program 104 times [2021-06-05 18:19:05,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:05,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347762282] [2021-06-05 18:19:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:06,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347762282] [2021-06-05 18:19:06,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347762282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305255643] [2021-06-05 18:19:06,030 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:06,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:06,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:06,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:06,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305255643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:06,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:19:06,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781913668] [2021-06-05 18:19:06,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:06,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:06,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:06,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:06,237 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:06,574 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 18:19:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:19:06,575 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:06,578 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:19:06,578 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:19:06,578 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:06,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:19:06,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:19:06,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:06,610 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:06,610 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:06,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:06,611 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:06,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:06,613 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:06,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:06,814 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:06,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1347551435, now seen corresponding path program 105 times [2021-06-05 18:19:06,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:06,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699030189] [2021-06-05 18:19:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:06,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:06,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699030189] [2021-06-05 18:19:06,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699030189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:06,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281649408] [2021-06-05 18:19:06,988 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:07,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:19:07,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:07,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:07,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281649408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:07,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:07,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:19:07,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833310687] [2021-06-05 18:19:07,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:07,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:07,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:07,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:07,207 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:07,584 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-06-05 18:19:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:19:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:07,589 INFO L225 Difference]: With dead ends: 4641 [2021-06-05 18:19:07,589 INFO L226 Difference]: Without dead ends: 4371 [2021-06-05 18:19:07,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:07,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-06-05 18:19:07,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-06-05 18:19:07,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:07,624 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:07,624 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:07,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:07,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:07,626 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:07,626 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:07,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 18:19:07,828 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:07,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2122470461, now seen corresponding path program 106 times [2021-06-05 18:19:07,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:07,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553352467] [2021-06-05 18:19:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:08,016 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:08,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:08,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553352467] [2021-06-05 18:19:08,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553352467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:08,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59167020] [2021-06-05 18:19:08,016 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:08,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:08,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:08,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:08,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59167020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:08,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:08,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:19:08,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239472650] [2021-06-05 18:19:08,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:08,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:08,270 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:08,710 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-06-05 18:19:08,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:08,710 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:08,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:08,714 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 18:19:08,714 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 18:19:08,715 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 18:19:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 18:19:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-06-05 18:19:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:08,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:08,747 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:08,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:08,747 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:08,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:08,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:08,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:08,750 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:08,750 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:08,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 18:19:08,950 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:08,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:08,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1718583475, now seen corresponding path program 107 times [2021-06-05 18:19:08,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:08,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344461299] [2021-06-05 18:19:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:09,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:09,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344461299] [2021-06-05 18:19:09,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344461299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809241143] [2021-06-05 18:19:09,115 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:09,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:19:09,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:09,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:09,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809241143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:09,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:09,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:19:09,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349766643] [2021-06-05 18:19:09,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:09,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:09,335 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:09,764 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-06-05 18:19:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:09,769 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 18:19:09,769 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 18:19:09,769 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 18:19:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-06-05 18:19:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:09,802 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:09,802 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:09,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:09,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:09,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:09,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:09,805 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:10,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-05 18:19:10,005 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:10,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1698371903, now seen corresponding path program 108 times [2021-06-05 18:19:10,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:10,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331636423] [2021-06-05 18:19:10,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:10,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:10,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331636423] [2021-06-05 18:19:10,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331636423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:10,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258285220] [2021-06-05 18:19:10,157 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:10,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:19:10,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:10,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:10,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258285220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:10,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:10,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:19:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246417848] [2021-06-05 18:19:10,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:10,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:10,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:10,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:10,377 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:10,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:10,761 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-06-05 18:19:10,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:10,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:10,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:10,766 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:19:10,766 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:19:10,766 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 18:19:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:19:10,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-06-05 18:19:10,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:10,798 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:10,798 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:10,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:10,800 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:10,800 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:11,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:11,001 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:11,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:11,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1696540593, now seen corresponding path program 109 times [2021-06-05 18:19:11,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:11,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007307199] [2021-06-05 18:19:11,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:11,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007307199] [2021-06-05 18:19:11,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007307199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368000224] [2021-06-05 18:19:11,153 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:11,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:11,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:11,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368000224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:11,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:11,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:19:11,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556872555] [2021-06-05 18:19:11,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:11,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:11,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:11,359 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:11,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:11,842 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-06-05 18:19:11,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:11,842 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:11,846 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:19:11,846 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:19:11,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:19:11,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-06-05 18:19:11,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:11,878 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:11,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:11,878 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:11,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:11,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:11,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:11,880 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:12,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:12,081 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:12,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:12,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1267476287, now seen corresponding path program 110 times [2021-06-05 18:19:12,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:12,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628299297] [2021-06-05 18:19:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:12,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:12,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628299297] [2021-06-05 18:19:12,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628299297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809325987] [2021-06-05 18:19:12,251 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:12,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:12,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:12,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:12,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:12,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809325987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:12,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:12,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:19:12,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094907438] [2021-06-05 18:19:12,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:12,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:12,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:12,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:12,471 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:12,914 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-06-05 18:19:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:12,915 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:12,918 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:19:12,919 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:19:12,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:19:12,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-06-05 18:19:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:12,950 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:12,950 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:12,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:12,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:12,953 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:13,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:13,157 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:13,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:13,157 INFO L82 PathProgramCache]: Analyzing trace with hash 581293103, now seen corresponding path program 111 times [2021-06-05 18:19:13,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:13,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510693583] [2021-06-05 18:19:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:13,321 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:13,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510693583] [2021-06-05 18:19:13,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510693583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650537510] [2021-06-05 18:19:13,322 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:13,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:19:13,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:13,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 18:19:13,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:13,562 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:13,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650537510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:13,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:13,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:19:13,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419543362] [2021-06-05 18:19:13,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:13,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:13,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:13,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:13,563 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:14,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:14,092 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-06-05 18:19:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:14,096 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:14,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:14,100 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:19:14,100 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:19:14,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 529.8ms TimeCoverageRelationStatistics Valid=567, Invalid=1883, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:14,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:19:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-06-05 18:19:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:14,131 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:14,132 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:14,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:14,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:14,134 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:14,134 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:14,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 18:19:14,334 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:14,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:14,335 INFO L82 PathProgramCache]: Analyzing trace with hash 496258365, now seen corresponding path program 112 times [2021-06-05 18:19:14,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:14,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741783684] [2021-06-05 18:19:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:14,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:14,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741783684] [2021-06-05 18:19:14,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741783684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:14,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507878832] [2021-06-05 18:19:14,485 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:14,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:14,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:14,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507878832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:14,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:14,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:19:14,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884559449] [2021-06-05 18:19:14,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:14,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:14,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:14,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:14,676 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:15,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:15,132 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-06-05 18:19:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:15,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:15,136 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:19:15,136 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:19:15,137 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 447.3ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:19:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 18:19:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:15,170 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:15,170 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:15,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:15,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:15,172 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:15,173 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:15,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 18:19:15,373 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash 428107309, now seen corresponding path program 113 times [2021-06-05 18:19:15,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:15,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026446580] [2021-06-05 18:19:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:15,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026446580] [2021-06-05 18:19:15,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026446580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:15,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740366468] [2021-06-05 18:19:15,509 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:15,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 18:19:15,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:15,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:15,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:15,712 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:15,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740366468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:15,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:15,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:19:15,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453964498] [2021-06-05 18:19:15,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:15,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:15,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:15,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:15,713 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:16,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:16,275 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-06-05 18:19:16,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:16,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:16,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:16,279 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 18:19:16,279 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 18:19:16,279 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:19:16,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 18:19:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-06-05 18:19:16,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:16,310 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:16,310 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:16,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:16,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:16,312 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:16,312 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:16,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 18:19:16,512 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:16,513 INFO L82 PathProgramCache]: Analyzing trace with hash -868861765, now seen corresponding path program 114 times [2021-06-05 18:19:16,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:16,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109943211] [2021-06-05 18:19:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:16,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:16,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109943211] [2021-06-05 18:19:16,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109943211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:16,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078669418] [2021-06-05 18:19:16,665 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:16,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 18:19:16,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:16,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:16,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:16,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078669418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:16,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:16,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:19:16,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235413441] [2021-06-05 18:19:16,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:16,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:16,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:16,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:16,860 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:17,346 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-06-05 18:19:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:17,346 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:17,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:17,349 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 18:19:17,350 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 18:19:17,350 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:19:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 18:19:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-06-05 18:19:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 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 18:19:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-06-05 18:19:17,381 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-06-05 18:19:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:17,381 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-06-05 18:19:17,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-06-05 18:19:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:17,383 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:17,383 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:17,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-05 18:19:17,584 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:17,584 INFO L82 PathProgramCache]: Analyzing trace with hash -439108181, now seen corresponding path program 115 times [2021-06-05 18:19:17,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:17,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245817475] [2021-06-05 18:19:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:17,718 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:17,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:17,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245817475] [2021-06-05 18:19:17,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245817475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397302450] [2021-06-05 18:19:17,718 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 18:19:17,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:17,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397302450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:17,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:17,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:19:17,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682176173] [2021-06-05 18:19:17,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:17,919 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:18,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:18,543 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-06-05 18:19:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:18,547 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 18:19:18,547 INFO L226 Difference]: Without dead ends: 3936 [2021-06-05 18:19:18,547 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 585.0ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:19:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-06-05 18:19:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-06-05 18:19:18,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.812840702604482) internal successors, (9288), 3302 states have internal predecessors, (9288), 0 states have call successors, (0), 0 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 18:19:18,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-06-05 18:19:18,594 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-06-05 18:19:18,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:18,594 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-06-05 18:19:18,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 18:19:18,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-06-05 18:19:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:18,596 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:18,596 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:18,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:18,798 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:18,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:18,798 INFO L82 PathProgramCache]: Analyzing trace with hash -496842311, now seen corresponding path program 116 times [2021-06-05 18:19:18,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:18,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245091776] [2021-06-05 18:19:18,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:18,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:18,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245091776] [2021-06-05 18:19:18,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245091776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:18,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531966571] [2021-06-05 18:19:18,937 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:19,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:19,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:19,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:19,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:19,128 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:19,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531966571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:19,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:19,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-06-05 18:19:19,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627673964] [2021-06-05 18:19:19,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 18:19:19,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:19,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 18:19:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-06-05 18:19:19,129 INFO L87 Difference]: Start difference. First operand 3303 states and 9288 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:19,658 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-06-05 18:19:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:19:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:19,663 INFO L225 Difference]: With dead ends: 4948 [2021-06-05 18:19:19,663 INFO L226 Difference]: Without dead ends: 4678 [2021-06-05 18:19:19,663 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 494.0ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:19:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-06-05 18:19:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-06-05 18:19:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.827972429638139) internal successors, (9847), 3482 states have internal predecessors, (9847), 0 states have call successors, (0), 0 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 18:19:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-06-05 18:19:19,705 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-06-05 18:19:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:19,705 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-06-05 18:19:19,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 18:19:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-06-05 18:19:19,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-06-05 18:19:19,707 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:19,707 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:19,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:19,909 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:19,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:19,909 INFO L82 PathProgramCache]: Analyzing trace with hash -474499061, now seen corresponding path program 117 times [2021-06-05 18:19:19,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:19,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575412136] [2021-06-05 18:19:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:20,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:20,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575412136] [2021-06-05 18:19:20,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575412136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:20,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707669765] [2021-06-05 18:19:20,041 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:20,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 18:19:20,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:20,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:20,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707669765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:20,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:20,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-06-05 18:19:20,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190420904] [2021-06-05 18:19:20,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:20,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:20,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:20,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:20,270 INFO L87 Difference]: Start difference. First operand 3483 states and 9847 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:19:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:21,003 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-06-05 18:19:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:19:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 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 105 [2021-06-05 18:19:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:21,007 INFO L225 Difference]: With dead ends: 4816 [2021-06-05 18:19:21,007 INFO L226 Difference]: Without dead ends: 4241 [2021-06-05 18:19:21,008 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 670.6ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:19:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-06-05 18:19:21,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-06-05 18:19:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 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 18:19:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-06-05 18:19:21,041 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-06-05 18:19:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:21,041 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-06-05 18:19:21,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 18:19:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-06-05 18:19:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:21,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:21,043 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:21,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 18:19:21,265 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1552772481, now seen corresponding path program 118 times [2021-06-05 18:19:21,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:21,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481516146] [2021-06-05 18:19:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:21,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481516146] [2021-06-05 18:19:21,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481516146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:21,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210795474] [2021-06-05 18:19:21,450 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:21,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:21,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:21,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:21,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:21,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210795474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:21,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:21,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-06-05 18:19:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053623106] [2021-06-05 18:19:21,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:19:21,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:21,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:19:21,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:19:21,685 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 18:19:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:22,083 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-06-05 18:19:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:19:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:22,087 INFO L225 Difference]: With dead ends: 3364 [2021-06-05 18:19:22,087 INFO L226 Difference]: Without dead ends: 3030 [2021-06-05 18:19:22,087 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:22,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-06-05 18:19:22,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-06-05 18:19:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7101328903654487) internal successors, (6526), 2408 states have internal predecessors, (6526), 0 states have call successors, (0), 0 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 18:19:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-06-05 18:19:22,110 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-06-05 18:19:22,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:22,110 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-06-05 18:19:22,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 18:19:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-06-05 18:19:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:22,112 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:22,112 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:22,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:22,312 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:22,312 INFO L82 PathProgramCache]: Analyzing trace with hash 642486821, now seen corresponding path program 119 times [2021-06-05 18:19:22,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:22,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998407481] [2021-06-05 18:19:22,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:22,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998407481] [2021-06-05 18:19:22,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998407481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:22,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414818984] [2021-06-05 18:19:22,484 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:22,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:22,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:22,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:22,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414818984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:22,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:22,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:22,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906417335] [2021-06-05 18:19:22,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:22,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:22,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:22,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:22,698 INFO L87 Difference]: Start difference. First operand 2409 states and 6526 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:23,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:23,011 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-06-05 18:19:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 18:19:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:23,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:23,026 INFO L225 Difference]: With dead ends: 4086 [2021-06-05 18:19:23,026 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 18:19:23,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 18:19:23,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 18:19:23,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-06-05 18:19:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.720611285266458) internal successors, (6943), 2552 states have internal predecessors, (6943), 0 states have call successors, (0), 0 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 18:19:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-06-05 18:19:23,050 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-06-05 18:19:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:23,050 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-06-05 18:19:23,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-06-05 18:19:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:23,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:23,052 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:23,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:23,254 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1552838891, now seen corresponding path program 120 times [2021-06-05 18:19:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:23,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352749033] [2021-06-05 18:19:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:23,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:23,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352749033] [2021-06-05 18:19:23,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352749033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:23,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745007716] [2021-06-05 18:19:23,471 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:23,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:23,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:23,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:23,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745007716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:23,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:23,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:23,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733007398] [2021-06-05 18:19:23,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:23,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:23,715 INFO L87 Difference]: Start difference. First operand 2553 states and 6943 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:24,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:24,124 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-06-05 18:19:24,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:19:24,124 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:24,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:24,128 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 18:19:24,128 INFO L226 Difference]: Without dead ends: 3776 [2021-06-05 18:19:24,128 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:19:24,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-06-05 18:19:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-06-05 18:19:24,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 2.7285877426722496) internal successors, (7168), 2627 states have internal predecessors, (7168), 0 states have call successors, (0), 0 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 18:19:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-06-05 18:19:24,153 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-06-05 18:19:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:24,153 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-06-05 18:19:24,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-06-05 18:19:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:24,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:24,155 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:24,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:24,357 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:24,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:24,357 INFO L82 PathProgramCache]: Analyzing trace with hash -42638813, now seen corresponding path program 121 times [2021-06-05 18:19:24,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:24,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357208874] [2021-06-05 18:19:24,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:24,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357208874] [2021-06-05 18:19:24,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357208874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504458013] [2021-06-05 18:19:24,525 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:24,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:24,727 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:24,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504458013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:24,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:24,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721497709] [2021-06-05 18:19:24,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:24,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:24,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:24,728 INFO L87 Difference]: Start difference. First operand 2628 states and 7168 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:25,077 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-06-05 18:19:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 18:19:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:25,081 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 18:19:25,081 INFO L226 Difference]: Without dead ends: 3826 [2021-06-05 18:19:25,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 18:19:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-05 18:19:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-06-05 18:19:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 2.736121391561806) internal successors, (7393), 2702 states have internal predecessors, (7393), 0 states have call successors, (0), 0 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 18:19:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-06-05 18:19:25,107 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-06-05 18:19:25,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:25,107 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-06-05 18:19:25,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:25,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-06-05 18:19:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:25,109 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:25,109 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:25,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 18:19:25,313 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:25,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash 597019411, now seen corresponding path program 122 times [2021-06-05 18:19:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:25,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716900298] [2021-06-05 18:19:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:25,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716900298] [2021-06-05 18:19:25,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716900298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689785488] [2021-06-05 18:19:25,508 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:25,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:25,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:25,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:25,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689785488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:25,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:25,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:25,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982822555] [2021-06-05 18:19:25,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:25,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:25,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:25,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:25,730 INFO L87 Difference]: Start difference. First operand 2703 states and 7393 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:26,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:26,165 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-06-05 18:19:26,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:26,165 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:26,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:26,169 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 18:19:26,169 INFO L226 Difference]: Without dead ends: 3851 [2021-06-05 18:19:26,169 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:26,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-06-05 18:19:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-06-05 18:19:26,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 2.7432481094706516) internal successors, (7618), 2777 states have internal predecessors, (7618), 0 states have call successors, (0), 0 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 18:19:26,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-06-05 18:19:26,199 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-06-05 18:19:26,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:26,199 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-06-05 18:19:26,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:26,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-06-05 18:19:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:26,201 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:26,201 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:26,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-05 18:19:26,401 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:26,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash -177899615, now seen corresponding path program 123 times [2021-06-05 18:19:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:26,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841694068] [2021-06-05 18:19:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:26,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:26,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841694068] [2021-06-05 18:19:26,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841694068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498843268] [2021-06-05 18:19:26,560 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:26,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:26,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 18:19:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:26,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498843268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:26,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:26,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:26,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579054435] [2021-06-05 18:19:26,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:26,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:26,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:26,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:26,769 INFO L87 Difference]: Start difference. First operand 2778 states and 7618 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:27,149 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-06-05 18:19:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:19:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:27,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:27,153 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 18:19:27,153 INFO L226 Difference]: Without dead ends: 3876 [2021-06-05 18:19:27,153 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:19:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-06-05 18:19:27,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-06-05 18:19:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 2.75) internal successors, (7843), 2852 states have internal predecessors, (7843), 0 states have call successors, (0), 0 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 18:19:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-06-05 18:19:27,183 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-06-05 18:19:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:27,183 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-06-05 18:19:27,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:27,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-06-05 18:19:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:27,185 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:27,185 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:27,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 18:19:27,386 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash -631812975, now seen corresponding path program 124 times [2021-06-05 18:19:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:27,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169446982] [2021-06-05 18:19:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:27,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169446982] [2021-06-05 18:19:27,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169446982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:27,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375025327] [2021-06-05 18:19:27,576 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:27,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:27,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:27,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:27,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:27,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375025327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:27,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:27,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:27,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490387734] [2021-06-05 18:19:27,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:27,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:27,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:27,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:27,807 INFO L87 Difference]: Start difference. First operand 2853 states and 7843 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:28,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:28,292 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-06-05 18:19:28,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:28,292 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:28,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:28,296 INFO L225 Difference]: With dead ends: 4171 [2021-06-05 18:19:28,296 INFO L226 Difference]: Without dead ends: 3901 [2021-06-05 18:19:28,296 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 532.4ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:28,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-06-05 18:19:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-06-05 18:19:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 2.756405876323881) internal successors, (8068), 2927 states have internal predecessors, (8068), 0 states have call successors, (0), 0 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 18:19:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-06-05 18:19:28,327 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-06-05 18:19:28,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:28,327 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-06-05 18:19:28,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:28,327 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-06-05 18:19:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:28,329 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:28,329 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:28,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 18:19:28,530 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:28,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:28,530 INFO L82 PathProgramCache]: Analyzing trace with hash 246198943, now seen corresponding path program 125 times [2021-06-05 18:19:28,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:28,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791129665] [2021-06-05 18:19:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:28,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:28,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791129665] [2021-06-05 18:19:28,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791129665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:28,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791822538] [2021-06-05 18:19:28,686 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:28,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:28,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:28,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:28,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:28,884 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:28,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791822538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:28,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:28,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:28,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841622814] [2021-06-05 18:19:28,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:28,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:28,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:28,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:28,885 INFO L87 Difference]: Start difference. First operand 2928 states and 8068 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:29,295 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-06-05 18:19:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:29,295 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:29,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:29,298 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 18:19:29,299 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 18:19:29,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 423.5ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:19:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 18:19:29,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-06-05 18:19:29,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.762491672218521) internal successors, (8293), 3002 states have internal predecessors, (8293), 0 states have call successors, (0), 0 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 18:19:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-06-05 18:19:29,329 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-06-05 18:19:29,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:29,330 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-06-05 18:19:29,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:29,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-06-05 18:19:29,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:29,332 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:29,332 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:29,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 18:19:29,532 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:29,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:29,532 INFO L82 PathProgramCache]: Analyzing trace with hash -653855857, now seen corresponding path program 126 times [2021-06-05 18:19:29,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:29,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226647194] [2021-06-05 18:19:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:29,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226647194] [2021-06-05 18:19:29,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226647194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:29,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102669436] [2021-06-05 18:19:29,748 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:29,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:29,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:29,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:29,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:29,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102669436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:29,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:29,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:29,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646048699] [2021-06-05 18:19:29,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:29,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:29,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:29,970 INFO L87 Difference]: Start difference. First operand 3003 states and 8293 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:30,504 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-06-05 18:19:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:30,505 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:30,508 INFO L225 Difference]: With dead ends: 4221 [2021-06-05 18:19:30,508 INFO L226 Difference]: Without dead ends: 3951 [2021-06-05 18:19:30,509 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 593.9ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-06-05 18:19:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-06-05 18:19:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.7682807929801756) internal successors, (8518), 3077 states have internal predecessors, (8518), 0 states have call successors, (0), 0 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 18:19:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-06-05 18:19:30,542 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-06-05 18:19:30,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:30,542 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-06-05 18:19:30,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:30,542 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-06-05 18:19:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:30,544 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:30,544 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:30,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:30,745 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1082920163, now seen corresponding path program 127 times [2021-06-05 18:19:30,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:30,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384075098] [2021-06-05 18:19:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:30,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384075098] [2021-06-05 18:19:30,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384075098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:30,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197059345] [2021-06-05 18:19:30,893 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:30,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:30,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:31,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197059345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:31,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:31,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:31,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944163083] [2021-06-05 18:19:31,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:31,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:31,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:31,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:31,132 INFO L87 Difference]: Start difference. First operand 3078 states and 8518 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:31,589 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-06-05 18:19:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:31,589 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:31,592 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 18:19:31,592 INFO L226 Difference]: Without dead ends: 3976 [2021-06-05 18:19:31,593 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:19:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-06-05 18:19:31,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-06-05 18:19:31,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7737944162436547) internal successors, (8743), 3152 states have internal predecessors, (8743), 0 states have call successors, (0), 0 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 18:19:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-06-05 18:19:31,645 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-06-05 18:19:31,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:31,645 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-06-05 18:19:31,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-06-05 18:19:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:31,648 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:31,648 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:31,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 18:19:31,855 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:31,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1769103347, now seen corresponding path program 128 times [2021-06-05 18:19:31,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:31,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062699584] [2021-06-05 18:19:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:32,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:32,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062699584] [2021-06-05 18:19:32,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062699584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544174669] [2021-06-05 18:19:32,008 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:32,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:32,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:32,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544174669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:32,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:32,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:32,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777067570] [2021-06-05 18:19:32,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:32,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:32,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:32,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:32,244 INFO L87 Difference]: Start difference. First operand 3153 states and 8743 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:32,834 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-06-05 18:19:32,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:32,835 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:32,838 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 18:19:32,838 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 18:19:32,838 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:32,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 18:19:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-06-05 18:19:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.779051750852185) internal successors, (8968), 3227 states have internal predecessors, (8968), 0 states have call successors, (0), 0 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 18:19:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-06-05 18:19:32,873 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-06-05 18:19:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:32,873 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-06-05 18:19:32,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-06-05 18:19:32,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:32,875 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:32,875 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:33,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:33,075 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:33,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1854138085, now seen corresponding path program 129 times [2021-06-05 18:19:33,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:33,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41593061] [2021-06-05 18:19:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:33,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:33,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41593061] [2021-06-05 18:19:33,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41593061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:33,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38558651] [2021-06-05 18:19:33,218 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:33,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:33,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:33,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 18:19:33,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:33,420 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:33,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38558651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:33,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:33,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:33,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799846266] [2021-06-05 18:19:33,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:33,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:33,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:33,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:33,421 INFO L87 Difference]: Start difference. First operand 3228 states and 8968 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:33,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:33,916 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-06-05 18:19:33,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:33,920 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:19:33,920 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:19:33,920 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:19:33,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:19:33,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-06-05 18:19:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.784070260448213) internal successors, (9193), 3302 states have internal predecessors, (9193), 0 states have call successors, (0), 0 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 18:19:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-06-05 18:19:33,953 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-06-05 18:19:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:33,953 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-06-05 18:19:33,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-06-05 18:19:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:33,955 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:33,955 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:34,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:34,156 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:34,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1922289141, now seen corresponding path program 130 times [2021-06-05 18:19:34,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:34,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875592093] [2021-06-05 18:19:34,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:34,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:34,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875592093] [2021-06-05 18:19:34,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875592093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:34,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631865475] [2021-06-05 18:19:34,303 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:34,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:34,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:34,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:34,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631865475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:34,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:34,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:34,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772226388] [2021-06-05 18:19:34,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:34,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:34,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:34,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:34,514 INFO L87 Difference]: Start difference. First operand 3303 states and 9193 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:35,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:35,158 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-06-05 18:19:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:35,158 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:35,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:35,162 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 18:19:35,162 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 18:19:35,162 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:35,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 18:19:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-06-05 18:19:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.788865857269766) internal successors, (9418), 3377 states have internal predecessors, (9418), 0 states have call successors, (0), 0 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 18:19:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-06-05 18:19:35,196 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-06-05 18:19:35,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:35,196 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-06-05 18:19:35,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-06-05 18:19:35,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:35,198 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:35,198 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:35,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:35,399 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:35,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1075709081, now seen corresponding path program 131 times [2021-06-05 18:19:35,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:35,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095113649] [2021-06-05 18:19:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:35,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095113649] [2021-06-05 18:19:35,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095113649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200464926] [2021-06-05 18:19:35,556 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:35,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:35,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:35,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:35,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:35,750 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:35,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200464926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:35,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:35,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:35,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755630509] [2021-06-05 18:19:35,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:35,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:35,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:35,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:35,751 INFO L87 Difference]: Start difference. First operand 3378 states and 9418 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:36,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:36,288 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-06-05 18:19:36,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:36,288 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:36,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:36,291 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 18:19:36,291 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 18:19:36,292 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:19:36,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 18:19:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-06-05 18:19:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.7977983777520277) internal successors, (9658), 3452 states have internal predecessors, (9658), 0 states have call successors, (0), 0 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 18:19:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-06-05 18:19:36,325 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-06-05 18:19:36,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:36,326 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-06-05 18:19:36,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:36,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-06-05 18:19:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:36,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:36,328 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:36,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:36,529 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:36,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:36,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1505462665, now seen corresponding path program 132 times [2021-06-05 18:19:36,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:36,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296872304] [2021-06-05 18:19:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:36,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:36,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296872304] [2021-06-05 18:19:36,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296872304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801274480] [2021-06-05 18:19:36,675 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:36,740 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:36,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:36,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:19:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:36,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801274480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:36,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:36,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:36,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157756395] [2021-06-05 18:19:36,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:36,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:36,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:36,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:36,895 INFO L87 Difference]: Start difference. First operand 3453 states and 9658 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:37,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:37,589 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-06-05 18:19:37,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:19:37,589 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:37,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:37,594 INFO L225 Difference]: With dead ends: 4969 [2021-06-05 18:19:37,594 INFO L226 Difference]: Without dead ends: 4346 [2021-06-05 18:19:37,594 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 636.1ms TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:19:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-06-05 18:19:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-06-05 18:19:37,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 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 18:19:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-06-05 18:19:37,629 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-06-05 18:19:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:37,629 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-06-05 18:19:37,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 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 18:19:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-06-05 18:19:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:37,632 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:37,632 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:37,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 18:19:37,832 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1447728535, now seen corresponding path program 133 times [2021-06-05 18:19:37,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:37,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851174169] [2021-06-05 18:19:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:37,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:37,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851174169] [2021-06-05 18:19:37,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851174169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:37,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299847090] [2021-06-05 18:19:37,973 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:38,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 18:19:38,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:38,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299847090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:38,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:38,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-06-05 18:19:38,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206383865] [2021-06-05 18:19:38,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 18:19:38,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:38,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 18:19:38,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-05 18:19:38,188 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:38,752 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-06-05 18:19:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:19:38,752 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:38,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:38,757 INFO L225 Difference]: With dead ends: 5198 [2021-06-05 18:19:38,757 INFO L226 Difference]: Without dead ends: 4928 [2021-06-05 18:19:38,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 532.6ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:19:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-06-05 18:19:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-06-05 18:19:38,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 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 18:19:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-06-05 18:19:38,800 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-06-05 18:19:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:38,800 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-06-05 18:19:38,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 18:19:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-06-05 18:19:38,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-06-05 18:19:38,803 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:38,803 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:39,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 18:19:39,004 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:39,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:39,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1470071785, now seen corresponding path program 134 times [2021-06-05 18:19:39,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:39,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672302746] [2021-06-05 18:19:39,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:39,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:39,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672302746] [2021-06-05 18:19:39,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672302746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:39,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46949140] [2021-06-05 18:19:39,165 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:39,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:39,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:39,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:39,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:39,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46949140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:39,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:39,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-06-05 18:19:39,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369833910] [2021-06-05 18:19:39,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:39,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:39,416 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 18:19:40,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:40,249 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-06-05 18:19:40,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:19:40,249 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 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 110 [2021-06-05 18:19:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:40,254 INFO L225 Difference]: With dead ends: 5021 [2021-06-05 18:19:40,254 INFO L226 Difference]: Without dead ends: 4446 [2021-06-05 18:19:40,254 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=843, Invalid=2697, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:19:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-06-05 18:19:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-06-05 18:19:40,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 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 18:19:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-06-05 18:19:40,283 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-06-05 18:19:40,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:40,284 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-06-05 18:19:40,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 18:19:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-06-05 18:19:40,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:40,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:40,285 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:40,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-06-05 18:19:40,486 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:40,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2082436406, now seen corresponding path program 135 times [2021-06-05 18:19:40,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:40,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432716035] [2021-06-05 18:19:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:40,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:40,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432716035] [2021-06-05 18:19:40,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432716035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:40,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615228496] [2021-06-05 18:19:40,688 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:40,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:40,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:40,936 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:40,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615228496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:40,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:40,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:40,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215611569] [2021-06-05 18:19:40,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:40,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:40,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:40,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:40,937 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:41,342 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-06-05 18:19:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 18:19:41,342 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:41,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:41,346 INFO L225 Difference]: With dead ends: 3821 [2021-06-05 18:19:41,346 INFO L226 Difference]: Without dead ends: 3551 [2021-06-05 18:19:41,346 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 443.6ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:19:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-06-05 18:19:41,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-06-05 18:19:41,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 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 18:19:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-06-05 18:19:41,374 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-06-05 18:19:41,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:41,374 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-06-05 18:19:41,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:41,374 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-06-05 18:19:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:41,376 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:41,376 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:41,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 18:19:41,576 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash -112889306, now seen corresponding path program 136 times [2021-06-05 18:19:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:41,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005262704] [2021-06-05 18:19:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:41,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005262704] [2021-06-05 18:19:41,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005262704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:41,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066363952] [2021-06-05 18:19:41,775 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:41,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:41,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:41,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:41,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:42,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066363952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:42,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:42,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923745198] [2021-06-05 18:19:42,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:42,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:42,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:42,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:42,008 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:42,427 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-06-05 18:19:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:19:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:42,431 INFO L225 Difference]: With dead ends: 4241 [2021-06-05 18:19:42,431 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 18:19:42,431 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:42,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 18:19:42,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-06-05 18:19:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 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 18:19:42,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-06-05 18:19:42,459 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-06-05 18:19:42,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:42,459 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-06-05 18:19:42,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:42,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-06-05 18:19:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:42,461 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:42,461 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:42,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:42,661 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:42,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1397310772, now seen corresponding path program 137 times [2021-06-05 18:19:42,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:42,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423769062] [2021-06-05 18:19:42,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:42,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:42,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:42,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423769062] [2021-06-05 18:19:42,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423769062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:42,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274087115] [2021-06-05 18:19:42,858 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:42,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:42,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:42,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:43,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274087115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:43,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:43,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308794615] [2021-06-05 18:19:43,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:43,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:43,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:43,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:43,072 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:43,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:43,466 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-06-05 18:19:43,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:19:43,467 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:43,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:43,471 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 18:19:43,471 INFO L226 Difference]: Without dead ends: 4001 [2021-06-05 18:19:43,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 435.9ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 18:19:43,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-06-05 18:19:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-06-05 18:19:43,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 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 18:19:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-06-05 18:19:43,502 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-06-05 18:19:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:43,502 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-06-05 18:19:43,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-06-05 18:19:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:43,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:43,504 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:43,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 18:19:43,705 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash 2036968996, now seen corresponding path program 138 times [2021-06-05 18:19:43,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:43,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611838324] [2021-06-05 18:19:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:43,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:43,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611838324] [2021-06-05 18:19:43,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611838324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:43,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646633444] [2021-06-05 18:19:43,893 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:43,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:43,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:43,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:44,125 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:44,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646633444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:44,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:44,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:44,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019476493] [2021-06-05 18:19:44,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:44,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:44,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:44,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:44,127 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:44,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:44,618 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-06-05 18:19:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:19:44,618 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:44,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:44,622 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 18:19:44,622 INFO L226 Difference]: Without dead ends: 4026 [2021-06-05 18:19:44,622 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=583, Invalid=1867, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-06-05 18:19:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-06-05 18:19:44,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 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 18:19:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-06-05 18:19:44,653 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-06-05 18:19:44,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:44,654 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-06-05 18:19:44,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-06-05 18:19:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:44,656 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:44,656 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:44,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-06-05 18:19:44,861 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1262049970, now seen corresponding path program 139 times [2021-06-05 18:19:44,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:44,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156856505] [2021-06-05 18:19:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:45,044 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:45,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:45,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156856505] [2021-06-05 18:19:45,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156856505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:45,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275974309] [2021-06-05 18:19:45,045 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:45,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:45,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275974309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:45,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:45,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:45,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419067830] [2021-06-05 18:19:45,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:45,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:45,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:45,256 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:45,686 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-06-05 18:19:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:19:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:45,690 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 18:19:45,690 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 18:19:45,690 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=597, Invalid=1853, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 18:19:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 18:19:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-06-05 18:19:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 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 18:19:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-06-05 18:19:45,718 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-06-05 18:19:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:45,719 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-06-05 18:19:45,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-06-05 18:19:45,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:45,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:45,721 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:45,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:45,921 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:45,922 INFO L82 PathProgramCache]: Analyzing trace with hash 808136610, now seen corresponding path program 140 times [2021-06-05 18:19:45,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:45,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349994533] [2021-06-05 18:19:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:46,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349994533] [2021-06-05 18:19:46,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349994533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:46,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836575447] [2021-06-05 18:19:46,111 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:46,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:46,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:46,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:46,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:46,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836575447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:46,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:46,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:46,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305726707] [2021-06-05 18:19:46,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:46,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:46,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:46,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:46,338 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:46,872 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-06-05 18:19:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:19:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:46,876 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 18:19:46,876 INFO L226 Difference]: Without dead ends: 4076 [2021-06-05 18:19:46,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=622, Invalid=2030, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:19:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-06-05 18:19:46,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-06-05 18:19:46,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 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 18:19:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-06-05 18:19:46,920 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-06-05 18:19:46,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:46,920 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-06-05 18:19:46,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:46,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-06-05 18:19:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:46,922 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:46,922 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:47,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2021-06-05 18:19:47,122 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:47,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1686148528, now seen corresponding path program 141 times [2021-06-05 18:19:47,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:47,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419800513] [2021-06-05 18:19:47,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:47,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419800513] [2021-06-05 18:19:47,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419800513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:47,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116371847] [2021-06-05 18:19:47,301 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:47,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:47,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:47,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:19:47,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116371847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:47,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:47,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754575286] [2021-06-05 18:19:47,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:47,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:47,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:47,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:47,511 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:48,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:48,002 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-06-05 18:19:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:19:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:48,006 INFO L225 Difference]: With dead ends: 4371 [2021-06-05 18:19:48,006 INFO L226 Difference]: Without dead ends: 4101 [2021-06-05 18:19:48,007 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 501.5ms TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:19:48,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-06-05 18:19:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-06-05 18:19:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 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 18:19:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-06-05 18:19:48,041 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-06-05 18:19:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:48,041 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-06-05 18:19:48,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-06-05 18:19:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:48,043 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:48,043 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:48,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:48,243 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:48,244 INFO L82 PathProgramCache]: Analyzing trace with hash 786093728, now seen corresponding path program 142 times [2021-06-05 18:19:48,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:48,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963407627] [2021-06-05 18:19:48,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:48,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:48,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963407627] [2021-06-05 18:19:48,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963407627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:48,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977817973] [2021-06-05 18:19:48,410 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:48,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:48,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:48,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:48,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977817973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:48,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:48,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:48,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40987765] [2021-06-05 18:19:48,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:48,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:48,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:48,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:48,664 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:49,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:49,262 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-06-05 18:19:49,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:19:49,262 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:49,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:49,266 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:19:49,266 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:19:49,266 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 590.4ms TimeCoverageRelationStatistics Valid=677, Invalid=2185, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:19:49,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:19:49,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-06-05 18:19:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 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 18:19:49,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-06-05 18:19:49,298 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-06-05 18:19:49,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:49,299 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-06-05 18:19:49,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:49,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-06-05 18:19:49,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:49,301 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:49,301 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:49,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:49,501 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 357029422, now seen corresponding path program 143 times [2021-06-05 18:19:49,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:49,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070756177] [2021-06-05 18:19:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:49,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:49,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:49,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070756177] [2021-06-05 18:19:49,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070756177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:49,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528383313] [2021-06-05 18:19:49,660 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:49,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:49,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:49,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528383313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:49,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:49,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:49,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234993861] [2021-06-05 18:19:49,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:49,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:49,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:49,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:49,868 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:50,401 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-06-05 18:19:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:19:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:50,405 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 18:19:50,405 INFO L226 Difference]: Without dead ends: 4151 [2021-06-05 18:19:50,405 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 507.6ms TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:19:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-06-05 18:19:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-06-05 18:19:50,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 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 18:19:50,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-06-05 18:19:50,440 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-06-05 18:19:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:50,440 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-06-05 18:19:50,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-06-05 18:19:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:50,442 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:50,442 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:50,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:50,643 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash -329153762, now seen corresponding path program 144 times [2021-06-05 18:19:50,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:50,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198714727] [2021-06-05 18:19:50,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:50,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:50,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198714727] [2021-06-05 18:19:50,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198714727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:50,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331237440] [2021-06-05 18:19:50,805 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:50,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:50,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:51,029 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:51,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331237440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:51,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:51,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:51,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850945896] [2021-06-05 18:19:51,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:51,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:51,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:51,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:51,030 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:51,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:51,675 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-06-05 18:19:51,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:19:51,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:51,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:51,679 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:19:51,679 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:19:51,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 637.7ms TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:19:51,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:19:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-06-05 18:19:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 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 18:19:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-06-05 18:19:51,715 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-06-05 18:19:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:51,715 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-06-05 18:19:51,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-06-05 18:19:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:51,717 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:51,717 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:51,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 18:19:51,918 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash -414188500, now seen corresponding path program 145 times [2021-06-05 18:19:51,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:51,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956909207] [2021-06-05 18:19:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:52,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:52,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956909207] [2021-06-05 18:19:52,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956909207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:52,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048620024] [2021-06-05 18:19:52,080 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:52,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048620024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:52,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:52,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:52,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642277172] [2021-06-05 18:19:52,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:52,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:52,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:52,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:52,287 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:52,823 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-06-05 18:19:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:19:52,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:52,828 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:19:52,828 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:19:52,828 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 529.5ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:19:52,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:19:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-06-05 18:19:52,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 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 18:19:52,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-06-05 18:19:52,865 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-06-05 18:19:52,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:52,865 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-06-05 18:19:52,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:52,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-06-05 18:19:52,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:52,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:52,867 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:53,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 18:19:53,068 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:53,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:53,068 INFO L82 PathProgramCache]: Analyzing trace with hash -482339556, now seen corresponding path program 146 times [2021-06-05 18:19:53,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:53,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639026027] [2021-06-05 18:19:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:53,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:53,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639026027] [2021-06-05 18:19:53,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639026027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:53,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080263008] [2021-06-05 18:19:53,226 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:53,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:19:53,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:53,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:53,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:53,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080263008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:53,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:53,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:53,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291401536] [2021-06-05 18:19:53,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:53,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:53,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:53,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:53,465 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:54,135 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-06-05 18:19:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:19:54,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:54,139 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:19:54,139 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:19:54,140 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 648.1ms TimeCoverageRelationStatistics Valid=835, Invalid=2471, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:19:54,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:19:54,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-06-05 18:19:54,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 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 18:19:54,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-06-05 18:19:54,178 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-06-05 18:19:54,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:54,178 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-06-05 18:19:54,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:54,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-06-05 18:19:54,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:54,181 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:54,181 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:54,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 18:19:54,382 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1779308630, now seen corresponding path program 147 times [2021-06-05 18:19:54,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:54,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696479037] [2021-06-05 18:19:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:54,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:54,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696479037] [2021-06-05 18:19:54,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696479037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:54,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987342382] [2021-06-05 18:19:54,534 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:54,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-05 18:19:54,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:54,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:19:54,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:54,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987342382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:54,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:54,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:54,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476180690] [2021-06-05 18:19:54,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:54,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:54,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:54,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:54,744 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:55,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:55,321 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-06-05 18:19:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:19:55,322 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:55,326 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 18:19:55,326 INFO L226 Difference]: Without dead ends: 4296 [2021-06-05 18:19:55,326 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:19:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-06-05 18:19:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-06-05 18:19:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 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 18:19:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-06-05 18:19:55,382 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-06-05 18:19:55,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:55,383 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-06-05 18:19:55,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-06-05 18:19:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:55,385 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:55,385 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:55,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 18:19:55,586 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:55,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:55,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1349555046, now seen corresponding path program 148 times [2021-06-05 18:19:55,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:55,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511911565] [2021-06-05 18:19:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:55,737 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:55,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:55,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511911565] [2021-06-05 18:19:55,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511911565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:55,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275775250] [2021-06-05 18:19:55,738 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:55,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:19:55,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:55,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:55,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275775250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:55,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:55,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:55,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732108631] [2021-06-05 18:19:55,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:55,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:55,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:55,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:55,952 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:56,748 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-06-05 18:19:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:19:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:56,753 INFO L225 Difference]: With dead ends: 5144 [2021-06-05 18:19:56,753 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 18:19:56,753 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:19:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 18:19:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-06-05 18:19:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 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 18:19:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-06-05 18:19:56,790 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-06-05 18:19:56,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:56,790 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-06-05 18:19:56,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 18:19:56,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-06-05 18:19:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:56,793 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:56,793 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:56,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:56,995 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:56,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1407289176, now seen corresponding path program 149 times [2021-06-05 18:19:56,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:56,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553763348] [2021-06-05 18:19:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:57,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:57,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:57,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553763348] [2021-06-05 18:19:57,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553763348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915236889] [2021-06-05 18:19:57,181 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:57,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 18:19:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 18:19:57,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:57,420 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:57,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915236889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:57,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:57,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-06-05 18:19:57,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393925736] [2021-06-05 18:19:57,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 18:19:57,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 18:19:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 18:19:57,421 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:58,068 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-06-05 18:19:58,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:19:58,068 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:58,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:58,073 INFO L225 Difference]: With dead ends: 5348 [2021-06-05 18:19:58,073 INFO L226 Difference]: Without dead ends: 5078 [2021-06-05 18:19:58,073 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 640.4ms TimeCoverageRelationStatistics Valid=1023, Invalid=2517, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:19:58,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-06-05 18:19:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-06-05 18:19:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 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 18:19:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-06-05 18:19:58,112 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-06-05 18:19:58,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:58,112 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-06-05 18:19:58,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 18:19:58,112 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-06-05 18:19:58,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-06-05 18:19:58,115 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:58,115 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:58,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:58,315 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:58,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1384945926, now seen corresponding path program 150 times [2021-06-05 18:19:58,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:58,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112346718] [2021-06-05 18:19:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:58,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112346718] [2021-06-05 18:19:58,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112346718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:58,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094985827] [2021-06-05 18:19:58,472 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:58,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-05 18:19:58,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:19:58,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:19:58,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:19:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094985827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:58,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:19:58,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-06-05 18:19:58,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921040897] [2021-06-05 18:19:58,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:19:58,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:19:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:19:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:19:58,692 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 18:19:59,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:19:59,481 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-06-05 18:19:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:19:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 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 115 [2021-06-05 18:19:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:19:59,486 INFO L225 Difference]: With dead ends: 5216 [2021-06-05 18:19:59,486 INFO L226 Difference]: Without dead ends: 4641 [2021-06-05 18:19:59,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 748.8ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:19:59,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-06-05 18:19:59,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-06-05 18:19:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 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 18:19:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-06-05 18:19:59,516 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-06-05 18:19:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:19:59,516 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-06-05 18:19:59,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 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 18:19:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-06-05 18:19:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:19:59,518 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:19:59,518 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:19:59,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:19:59,718 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:19:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:19:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash -736595598, now seen corresponding path program 151 times [2021-06-05 18:19:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:19:59,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591914524] [2021-06-05 18:19:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:19:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:19:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:19:59,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:19:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591914524] [2021-06-05 18:19:59,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591914524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:19:59,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101108638] [2021-06-05 18:19:59,943 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:00,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:00,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:00,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101108638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:00,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:00,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-06-05 18:20:00,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928853228] [2021-06-05 18:20:00,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 18:20:00,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 18:20:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-06-05 18:20:00,207 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 18:20:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:00,634 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-06-05 18:20:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:00,637 INFO L225 Difference]: With dead ends: 3614 [2021-06-05 18:20:00,637 INFO L226 Difference]: Without dead ends: 3280 [2021-06-05 18:20:00,637 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:20:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-06-05 18:20:00,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-06-05 18:20:00,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.71319018404908) internal successors, (7076), 2608 states have internal predecessors, (7076), 0 states have call successors, (0), 0 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 18:20:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-06-05 18:20:00,661 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-06-05 18:20:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:00,661 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-06-05 18:20:00,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 18:20:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-06-05 18:20:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:00,663 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:00,663 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:00,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:00,864 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:00,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:00,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1812195050, now seen corresponding path program 152 times [2021-06-05 18:20:00,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:00,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715671364] [2021-06-05 18:20:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:00,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:01,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:01,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715671364] [2021-06-05 18:20:01,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715671364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047384215] [2021-06-05 18:20:01,066 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:01,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:01,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:01,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:01,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047384215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539003391] [2021-06-05 18:20:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:01,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:01,314 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:01,675 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-06-05 18:20:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 18:20:01,675 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:01,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:01,679 INFO L225 Difference]: With dead ends: 4436 [2021-06-05 18:20:01,679 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 18:20:01,679 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 18:20:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 18:20:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-06-05 18:20:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.722747093023256) internal successors, (7493), 2752 states have internal predecessors, (7493), 0 states have call successors, (0), 0 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 18:20:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-06-05 18:20:01,707 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-06-05 18:20:01,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:01,707 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-06-05 18:20:01,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:01,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-06-05 18:20:01,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:01,709 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:01,709 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:01,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:01,910 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:01,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:01,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1564387846, now seen corresponding path program 153 times [2021-06-05 18:20:01,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:01,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94735644] [2021-06-05 18:20:01,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:02,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:02,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94735644] [2021-06-05 18:20:02,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94735644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:02,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805608792] [2021-06-05 18:20:02,167 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:02,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:02,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:02,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:02,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:02,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805608792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:02,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:02,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:02,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165883094] [2021-06-05 18:20:02,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:02,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:02,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:02,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:02,453 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:02,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:02,931 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-06-05 18:20:02,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:02,931 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:02,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:02,935 INFO L225 Difference]: With dead ends: 4396 [2021-06-05 18:20:02,935 INFO L226 Difference]: Without dead ends: 4126 [2021-06-05 18:20:02,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 579.4ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:20:02,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-06-05 18:20:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-06-05 18:20:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.73010258224266) internal successors, (7718), 2827 states have internal predecessors, (7718), 0 states have call successors, (0), 0 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 18:20:02,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-06-05 18:20:02,962 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-06-05 18:20:02,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:02,963 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-06-05 18:20:02,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:02,963 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-06-05 18:20:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:02,964 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:02,964 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:03,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:03,165 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:03,165 INFO L82 PathProgramCache]: Analyzing trace with hash -212302956, now seen corresponding path program 154 times [2021-06-05 18:20:03,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:03,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334321442] [2021-06-05 18:20:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:03,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:03,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:03,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334321442] [2021-06-05 18:20:03,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334321442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:03,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187420458] [2021-06-05 18:20:03,399 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:03,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:03,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:03,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:03,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:03,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187420458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:03,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:03,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:03,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681493798] [2021-06-05 18:20:03,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:03,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:03,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:03,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:03,669 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:04,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:04,144 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-06-05 18:20:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 18:20:04,145 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:04,149 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 18:20:04,149 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 18:20:04,149 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 18:20:04,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 18:20:04,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-06-05 18:20:04,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7370778773259823) internal successors, (7943), 2902 states have internal predecessors, (7943), 0 states have call successors, (0), 0 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 18:20:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-06-05 18:20:04,178 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-06-05 18:20:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:04,178 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-06-05 18:20:04,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-06-05 18:20:04,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:04,180 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:04,180 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:04,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 18:20:04,381 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:04,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1887338628, now seen corresponding path program 155 times [2021-06-05 18:20:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:04,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966485530] [2021-06-05 18:20:04,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:04,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966485530] [2021-06-05 18:20:04,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966485530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:04,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238503650] [2021-06-05 18:20:04,659 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:04,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:04,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:04,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:04,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238503650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:04,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:04,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:04,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264881352] [2021-06-05 18:20:04,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:04,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:04,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:04,909 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:05,449 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-06-05 18:20:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:05,453 INFO L225 Difference]: With dead ends: 4471 [2021-06-05 18:20:05,453 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 18:20:05,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 607.1ms TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:20:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 18:20:05,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-06-05 18:20:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7437017131340276) internal successors, (8168), 2977 states have internal predecessors, (8168), 0 states have call successors, (0), 0 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 18:20:05,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-06-05 18:20:05,485 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-06-05 18:20:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:05,486 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-06-05 18:20:05,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:05,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-06-05 18:20:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:05,488 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:05,488 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:05,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-06-05 18:20:05,688 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash -897428590, now seen corresponding path program 156 times [2021-06-05 18:20:05,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:05,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979474223] [2021-06-05 18:20:05,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:05,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:05,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979474223] [2021-06-05 18:20:05,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979474223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:05,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222765273] [2021-06-05 18:20:05,885 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:05,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:05,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:05,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:05,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:06,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222765273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:06,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:06,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:06,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67178304] [2021-06-05 18:20:06,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:06,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:06,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:06,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:06,115 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:06,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:06,543 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-06-05 18:20:06,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 18:20:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:06,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:06,561 INFO L225 Difference]: With dead ends: 4496 [2021-06-05 18:20:06,561 INFO L226 Difference]: Without dead ends: 4226 [2021-06-05 18:20:06,561 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 483.4ms TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:20:06,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-06-05 18:20:06,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-06-05 18:20:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.75) internal successors, (8393), 3052 states have internal predecessors, (8393), 0 states have call successors, (0), 0 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 18:20:06,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-06-05 18:20:06,602 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-06-05 18:20:06,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:06,602 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-06-05 18:20:06,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:06,603 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-06-05 18:20:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:06,605 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:06,605 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:06,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-05 18:20:06,805 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:06,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:06,806 INFO L82 PathProgramCache]: Analyzing trace with hash -257770366, now seen corresponding path program 157 times [2021-06-05 18:20:06,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:06,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708638726] [2021-06-05 18:20:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:07,009 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:07,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708638726] [2021-06-05 18:20:07,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708638726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:07,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654596016] [2021-06-05 18:20:07,010 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:07,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:07,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654596016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:07,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:07,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:07,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227246457] [2021-06-05 18:20:07,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:07,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:07,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:07,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:07,262 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:07,854 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-06-05 18:20:07,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:07,854 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:07,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:07,858 INFO L225 Difference]: With dead ends: 4521 [2021-06-05 18:20:07,858 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 18:20:07,859 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 626.7ms TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:20:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 18:20:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-06-05 18:20:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7559961624560283) internal successors, (8618), 3127 states have internal predecessors, (8618), 0 states have call successors, (0), 0 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 18:20:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-06-05 18:20:07,890 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-06-05 18:20:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:07,890 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-06-05 18:20:07,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-06-05 18:20:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:07,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:07,893 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:08,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 18:20:08,093 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:08,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:08,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1032689392, now seen corresponding path program 158 times [2021-06-05 18:20:08,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:08,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926948597] [2021-06-05 18:20:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:08,282 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:08,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926948597] [2021-06-05 18:20:08,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926948597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:08,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822643148] [2021-06-05 18:20:08,283 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:08,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:08,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:08,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:08,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:08,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822643148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:08,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:08,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:08,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072726806] [2021-06-05 18:20:08,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:08,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:08,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:08,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:08,503 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:09,025 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-06-05 18:20:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:09,030 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 18:20:09,030 INFO L226 Difference]: Without dead ends: 4276 [2021-06-05 18:20:09,030 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 503.4ms TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 18:20:09,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-06-05 18:20:09,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-06-05 18:20:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7617114303560273) internal successors, (8843), 3202 states have internal predecessors, (8843), 0 states have call successors, (0), 0 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 18:20:09,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-06-05 18:20:09,065 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-06-05 18:20:09,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:09,065 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-06-05 18:20:09,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:09,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-06-05 18:20:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:09,067 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:09,067 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:09,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:09,268 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:09,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:09,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1486602752, now seen corresponding path program 159 times [2021-06-05 18:20:09,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:09,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794913964] [2021-06-05 18:20:09,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:09,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:09,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794913964] [2021-06-05 18:20:09,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794913964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:09,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863210689] [2021-06-05 18:20:09,465 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:09,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:09,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:09,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 18:20:09,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:09,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863210689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:09,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:09,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:09,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555298237] [2021-06-05 18:20:09,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:09,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:09,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:09,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:09,719 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:10,280 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-06-05 18:20:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:10,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:10,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:10,284 INFO L225 Difference]: With dead ends: 4571 [2021-06-05 18:20:10,284 INFO L226 Difference]: Without dead ends: 4301 [2021-06-05 18:20:10,285 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=619, Invalid=2137, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:20:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-06-05 18:20:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-06-05 18:20:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.767165090021361) internal successors, (9068), 3277 states have internal predecessors, (9068), 0 states have call successors, (0), 0 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 18:20:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-06-05 18:20:10,319 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-06-05 18:20:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:10,320 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-06-05 18:20:10,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-06-05 18:20:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:10,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:10,322 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:10,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 18:20:10,522 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash -608590834, now seen corresponding path program 160 times [2021-06-05 18:20:10,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:10,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541587997] [2021-06-05 18:20:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:10,715 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:10,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:10,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541587997] [2021-06-05 18:20:10,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541587997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:10,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092652085] [2021-06-05 18:20:10,715 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:10,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:10,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:10,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:10,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092652085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:10,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:10,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:10,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983443283] [2021-06-05 18:20:10,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:10,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:10,991 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:11,546 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-06-05 18:20:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:11,546 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:11,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:11,551 INFO L225 Difference]: With dead ends: 4596 [2021-06-05 18:20:11,551 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 18:20:11,551 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 18:20:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 18:20:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-06-05 18:20:11,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7723747016706444) internal successors, (9293), 3352 states have internal predecessors, (9293), 0 states have call successors, (0), 0 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 18:20:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-06-05 18:20:11,589 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-06-05 18:20:11,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:11,589 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-06-05 18:20:11,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-06-05 18:20:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:11,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:11,591 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:11,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:11,792 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1508645634, now seen corresponding path program 161 times [2021-06-05 18:20:11,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:11,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532643068] [2021-06-05 18:20:11,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:11,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:11,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532643068] [2021-06-05 18:20:11,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532643068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:11,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337706306] [2021-06-05 18:20:11,977 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:12,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:12,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:12,211 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:12,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337706306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:12,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:12,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:12,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684568431] [2021-06-05 18:20:12,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:12,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:12,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:12,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:12,212 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:12,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:12,902 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-06-05 18:20:12,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:20:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:12,906 INFO L225 Difference]: With dead ends: 4621 [2021-06-05 18:20:12,906 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 18:20:12,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 661.6ms TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:20:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 18:20:12,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-06-05 18:20:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7773562882988037) internal successors, (9518), 3427 states have internal predecessors, (9518), 0 states have call successors, (0), 0 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 18:20:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-06-05 18:20:12,943 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-06-05 18:20:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:12,943 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-06-05 18:20:12,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-06-05 18:20:12,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:12,945 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:12,945 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:13,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:13,146 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:13,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:13,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1937709940, now seen corresponding path program 162 times [2021-06-05 18:20:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:13,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571876513] [2021-06-05 18:20:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:13,351 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:13,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:13,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571876513] [2021-06-05 18:20:13,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571876513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:13,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794402420] [2021-06-05 18:20:13,352 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:13,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:13,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:13,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:13,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794402420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:13,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:13,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:13,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680520071] [2021-06-05 18:20:13,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:13,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:13,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:13,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:13,599 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:14,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:14,173 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-06-05 18:20:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:20:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:14,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:14,178 INFO L225 Difference]: With dead ends: 4646 [2021-06-05 18:20:14,178 INFO L226 Difference]: Without dead ends: 4376 [2021-06-05 18:20:14,178 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 552.9ms TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 18:20:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-05 18:20:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-06-05 18:20:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7821245002855512) internal successors, (9743), 3502 states have internal predecessors, (9743), 0 states have call successors, (0), 0 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 18:20:14,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-06-05 18:20:14,219 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-06-05 18:20:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:14,219 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-06-05 18:20:14,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-06-05 18:20:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:14,222 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:14,222 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:14,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:14,424 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1671074172, now seen corresponding path program 163 times [2021-06-05 18:20:14,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:14,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023331510] [2021-06-05 18:20:14,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:14,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023331510] [2021-06-05 18:20:14,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023331510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:14,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129323557] [2021-06-05 18:20:14,616 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:14,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:14,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:14,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129323557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:14,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:14,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:14,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563684267] [2021-06-05 18:20:14,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:14,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:14,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:14,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:14,848 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:15,616 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-06-05 18:20:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:20:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:15,620 INFO L225 Difference]: With dead ends: 4671 [2021-06-05 18:20:15,620 INFO L226 Difference]: Without dead ends: 4401 [2021-06-05 18:20:15,621 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 736.8ms TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:20:15,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-05 18:20:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-06-05 18:20:15,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.786692759295499) internal successors, (9968), 3577 states have internal predecessors, (9968), 0 states have call successors, (0), 0 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 18:20:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-06-05 18:20:15,659 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-06-05 18:20:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:15,659 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-06-05 18:20:15,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-06-05 18:20:15,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:15,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:15,662 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:15,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:15,862 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1586039434, now seen corresponding path program 164 times [2021-06-05 18:20:15,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:15,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696898152] [2021-06-05 18:20:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:16,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:16,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696898152] [2021-06-05 18:20:16,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696898152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:16,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564966565] [2021-06-05 18:20:16,040 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:16,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:16,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:16,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:16,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:16,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564966565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:16,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:16,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:16,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080919838] [2021-06-05 18:20:16,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:16,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:16,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:16,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:16,266 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:16,879 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-06-05 18:20:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:20:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:16,884 INFO L225 Difference]: With dead ends: 4696 [2021-06-05 18:20:16,884 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 18:20:16,884 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 570.7ms TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 18:20:16,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 18:20:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-06-05 18:20:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7910733844468782) internal successors, (10193), 3652 states have internal predecessors, (10193), 0 states have call successors, (0), 0 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 18:20:16,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-06-05 18:20:16,925 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-06-05 18:20:16,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:16,926 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-06-05 18:20:16,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-06-05 18:20:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:16,928 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:16,928 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:17,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-06-05 18:20:17,133 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:17,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:17,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1517888378, now seen corresponding path program 165 times [2021-06-05 18:20:17,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:17,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974862542] [2021-06-05 18:20:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:17,311 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:17,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974862542] [2021-06-05 18:20:17,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974862542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950946129] [2021-06-05 18:20:17,311 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:17,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:17,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:17,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 18:20:17,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:17,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950946129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:17,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:17,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:17,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432633380] [2021-06-05 18:20:17,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:17,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:17,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:17,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:17,569 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:18,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:18,270 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-06-05 18:20:18,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:20:18,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:18,274 INFO L225 Difference]: With dead ends: 4721 [2021-06-05 18:20:18,275 INFO L226 Difference]: Without dead ends: 4451 [2021-06-05 18:20:18,275 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:20:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-06-05 18:20:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-06-05 18:20:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.795277703246579) internal successors, (10418), 3727 states have internal predecessors, (10418), 0 states have call successors, (0), 0 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 18:20:18,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-06-05 18:20:18,315 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-06-05 18:20:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:18,315 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-06-05 18:20:18,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-06-05 18:20:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:18,317 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:18,318 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:18,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-05 18:20:18,518 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:18,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash 220919304, now seen corresponding path program 166 times [2021-06-05 18:20:18,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:18,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986702846] [2021-06-05 18:20:18,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:18,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:18,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986702846] [2021-06-05 18:20:18,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986702846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850724983] [2021-06-05 18:20:18,704 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:18,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:18,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:18,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:18,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:18,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850724983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:18,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:18,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597507968] [2021-06-05 18:20:18,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:18,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:18,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:18,943 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:19,567 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-06-05 18:20:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:20:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:19,572 INFO L225 Difference]: With dead ends: 4791 [2021-06-05 18:20:19,573 INFO L226 Difference]: Without dead ends: 4521 [2021-06-05 18:20:19,573 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 18:20:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-06-05 18:20:19,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-06-05 18:20:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.8032614413466597) internal successors, (10658), 3802 states have internal predecessors, (10658), 0 states have call successors, (0), 0 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 18:20:19,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-06-05 18:20:19,631 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-06-05 18:20:19,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:19,631 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-06-05 18:20:19,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:19,631 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-06-05 18:20:19,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:19,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:19,634 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:19,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 18:20:19,837 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 650672888, now seen corresponding path program 167 times [2021-06-05 18:20:19,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:19,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291782366] [2021-06-05 18:20:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:20,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:20,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291782366] [2021-06-05 18:20:20,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291782366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:20,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633067731] [2021-06-05 18:20:20,013 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:20,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:20,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:20,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:20,239 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:20,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633067731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:20,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:20,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-06-05 18:20:20,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591719142] [2021-06-05 18:20:20,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:20,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:20,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:20,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:20,240 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:21,108 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-06-05 18:20:21,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:20:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:21,114 INFO L225 Difference]: With dead ends: 5369 [2021-06-05 18:20:21,114 INFO L226 Difference]: Without dead ends: 4746 [2021-06-05 18:20:21,114 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 821.0ms TimeCoverageRelationStatistics Valid=1065, Invalid=3095, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 18:20:21,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-06-05 18:20:21,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-06-05 18:20:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8083569770441064) internal successors, (10888), 3877 states have internal predecessors, (10888), 0 states have call successors, (0), 0 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 18:20:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-06-05 18:20:21,152 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-06-05 18:20:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:21,152 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-06-05 18:20:21,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 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 18:20:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-06-05 18:20:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:21,155 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:21,155 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:21,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:21,356 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash 592938758, now seen corresponding path program 168 times [2021-06-05 18:20:21,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:21,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366417514] [2021-06-05 18:20:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:21,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366417514] [2021-06-05 18:20:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366417514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335366818] [2021-06-05 18:20:21,555 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:21,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:21,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:21,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:21,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335366818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:21,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:21,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372962566] [2021-06-05 18:20:21,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:21,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:21,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:21,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:21,788 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:22,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:22,481 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-06-05 18:20:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:20:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:22,486 INFO L225 Difference]: With dead ends: 5598 [2021-06-05 18:20:22,486 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 18:20:22,487 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 689.3ms TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 18:20:22,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 18:20:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-06-05 18:20:22,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 2.82154301207789) internal successors, (11447), 4057 states have internal predecessors, (11447), 0 states have call successors, (0), 0 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 18:20:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-06-05 18:20:22,533 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-06-05 18:20:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:22,533 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-06-05 18:20:22,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-06-05 18:20:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-06-05 18:20:22,536 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:22,536 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:22,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:22,737 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:22,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:22,737 INFO L82 PathProgramCache]: Analyzing trace with hash 615282008, now seen corresponding path program 169 times [2021-06-05 18:20:22,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:22,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278759495] [2021-06-05 18:20:22,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:22,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278759495] [2021-06-05 18:20:22,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278759495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:22,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306490330] [2021-06-05 18:20:22,912 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:22,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-05 18:20:22,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:23,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306490330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:23,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:23,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-06-05 18:20:23,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948405695] [2021-06-05 18:20:23,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 18:20:23,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:23,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 18:20:23,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-06-05 18:20:23,120 INFO L87 Difference]: Start difference. First operand 4058 states and 11447 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:23,945 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-06-05 18:20:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:20:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 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 120 [2021-06-05 18:20:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:23,950 INFO L225 Difference]: With dead ends: 5085 [2021-06-05 18:20:23,950 INFO L226 Difference]: Without dead ends: 4506 [2021-06-05 18:20:23,951 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 800.8ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:20:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-06-05 18:20:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-06-05 18:20:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7389380530973453) internal successors, (7428), 2712 states have internal predecessors, (7428), 0 states have call successors, (0), 0 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 18:20:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-06-05 18:20:23,997 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-06-05 18:20:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:23,997 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-06-05 18:20:23,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 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 18:20:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-06-05 18:20:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:23,999 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:23,999 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:24,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:24,200 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:24,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1413473561, now seen corresponding path program 170 times [2021-06-05 18:20:24,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:24,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317371006] [2021-06-05 18:20:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:24,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317371006] [2021-06-05 18:20:24,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317371006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:24,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292073900] [2021-06-05 18:20:24,434 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:24,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:24,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:24,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:24,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:24,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292073900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:24,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:24,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:24,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694671315] [2021-06-05 18:20:24,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:24,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:24,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:24,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:24,673 INFO L87 Difference]: Start difference. First operand 2713 states and 7428 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:25,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:25,084 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-06-05 18:20:25,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 18:20:25,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:25,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:25,088 INFO L225 Difference]: With dead ends: 4031 [2021-06-05 18:20:25,088 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 18:20:25,089 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 502.3ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 18:20:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 18:20:25,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-06-05 18:20:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.7459634015069967) internal successors, (7653), 2787 states have internal predecessors, (7653), 0 states have call successors, (0), 0 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 18:20:25,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-06-05 18:20:25,128 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-06-05 18:20:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:25,128 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-06-05 18:20:25,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-06-05 18:20:25,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:25,131 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:25,131 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:25,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-05 18:20:25,345 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:25,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:25,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1963109335, now seen corresponding path program 171 times [2021-06-05 18:20:25,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:25,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835637403] [2021-06-05 18:20:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:25,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:25,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835637403] [2021-06-05 18:20:25,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835637403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:25,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962324896] [2021-06-05 18:20:25,574 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:25,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:25,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:25,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:25,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962324896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:25,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:25,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:25,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331480101] [2021-06-05 18:20:25,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:25,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:25,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:25,830 INFO L87 Difference]: Start difference. First operand 2788 states and 7653 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:26,300 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-06-05 18:20:26,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 18:20:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:26,303 INFO L225 Difference]: With dead ends: 4501 [2021-06-05 18:20:26,304 INFO L226 Difference]: Without dead ends: 4231 [2021-06-05 18:20:26,304 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:20:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-06-05 18:20:26,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-06-05 18:20:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.752620545073375) internal successors, (7878), 2862 states have internal predecessors, (7878), 0 states have call successors, (0), 0 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 18:20:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-06-05 18:20:26,332 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-06-05 18:20:26,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:26,332 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-06-05 18:20:26,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:26,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-06-05 18:20:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:26,334 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:26,334 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:26,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-05 18:20:26,535 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:26,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:26,535 INFO L82 PathProgramCache]: Analyzing trace with hash 186418533, now seen corresponding path program 172 times [2021-06-05 18:20:26,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:26,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001963948] [2021-06-05 18:20:26,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:26,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:26,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001963948] [2021-06-05 18:20:26,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001963948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:26,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662557879] [2021-06-05 18:20:26,746 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:26,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:26,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:26,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:26,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:26,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662557879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:26,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:26,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:26,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742457209] [2021-06-05 18:20:26,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:26,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:26,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:26,975 INFO L87 Difference]: Start difference. First operand 2863 states and 7878 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:27,439 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-06-05 18:20:27,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 18:20:27,439 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:27,444 INFO L225 Difference]: With dead ends: 4531 [2021-06-05 18:20:27,444 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 18:20:27,444 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 512.2ms TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 18:20:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 18:20:27,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-06-05 18:20:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.758937691521961) internal successors, (8103), 2937 states have internal predecessors, (8103), 0 states have call successors, (0), 0 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 18:20:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-06-05 18:20:27,476 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-06-05 18:20:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:27,476 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-06-05 18:20:27,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-06-05 18:20:27,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:27,478 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:27,478 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:27,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:27,679 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:27,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2008907179, now seen corresponding path program 173 times [2021-06-05 18:20:27,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:27,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009255307] [2021-06-05 18:20:27,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:27,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:27,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009255307] [2021-06-05 18:20:27,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009255307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:27,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048040063] [2021-06-05 18:20:27,932 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:28,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:28,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:28,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:28,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:28,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048040063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:28,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:28,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:28,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444307336] [2021-06-05 18:20:28,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:28,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:28,242 INFO L87 Difference]: Start difference. First operand 2938 states and 8103 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:28,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:28,789 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-06-05 18:20:28,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 18:20:28,789 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:28,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:28,793 INFO L225 Difference]: With dead ends: 4556 [2021-06-05 18:20:28,793 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 18:20:28,794 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 629.9ms TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:20:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 18:20:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-06-05 18:20:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.764940239043825) internal successors, (8328), 3012 states have internal predecessors, (8328), 0 states have call successors, (0), 0 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 18:20:28,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-06-05 18:20:28,831 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-06-05 18:20:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:28,831 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-06-05 18:20:28,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:28,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-06-05 18:20:28,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:28,834 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:28,834 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:29,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:29,034 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash -498707101, now seen corresponding path program 174 times [2021-06-05 18:20:29,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:29,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121438207] [2021-06-05 18:20:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:29,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:29,231 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:29,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:29,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121438207] [2021-06-05 18:20:29,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121438207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:29,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028368525] [2021-06-05 18:20:29,231 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:29,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:29,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:29,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:29,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:29,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028368525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:29,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:29,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:29,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517626310] [2021-06-05 18:20:29,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:29,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:29,474 INFO L87 Difference]: Start difference. First operand 3013 states and 8328 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:29,954 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-06-05 18:20:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 18:20:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:29,958 INFO L225 Difference]: With dead ends: 4581 [2021-06-05 18:20:29,958 INFO L226 Difference]: Without dead ends: 4311 [2021-06-05 18:20:29,959 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 18:20:29,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-06-05 18:20:29,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-06-05 18:20:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.770651117589893) internal successors, (8553), 3087 states have internal predecessors, (8553), 0 states have call successors, (0), 0 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 18:20:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-06-05 18:20:29,994 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-06-05 18:20:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:29,994 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-06-05 18:20:29,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-06-05 18:20:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:29,996 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:29,996 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:30,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:30,196 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash 140951123, now seen corresponding path program 175 times [2021-06-05 18:20:30,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:30,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504728440] [2021-06-05 18:20:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:30,404 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:30,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:30,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504728440] [2021-06-05 18:20:30,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504728440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:30,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434610160] [2021-06-05 18:20:30,405 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:30,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:30,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:30,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:30,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434610160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:30,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:30,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:30,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319587563] [2021-06-05 18:20:30,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:30,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:30,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:30,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:30,666 INFO L87 Difference]: Start difference. First operand 3088 states and 8553 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:31,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:31,258 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-06-05 18:20:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 18:20:31,259 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:31,264 INFO L225 Difference]: With dead ends: 4606 [2021-06-05 18:20:31,264 INFO L226 Difference]: Without dead ends: 4336 [2021-06-05 18:20:31,264 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 635.0ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:20:31,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-06-05 18:20:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-06-05 18:20:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.7760910815939277) internal successors, (8778), 3162 states have internal predecessors, (8778), 0 states have call successors, (0), 0 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 18:20:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-06-05 18:20:31,307 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-06-05 18:20:31,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:31,307 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-06-05 18:20:31,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:31,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-06-05 18:20:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:31,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:31,309 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:31,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:31,510 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -633967903, now seen corresponding path program 176 times [2021-06-05 18:20:31,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:31,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760437890] [2021-06-05 18:20:31,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:31,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760437890] [2021-06-05 18:20:31,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760437890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674743544] [2021-06-05 18:20:31,701 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:31,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:31,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674743544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:31,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:31,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286284870] [2021-06-05 18:20:31,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:31,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:31,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:31,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:31,926 INFO L87 Difference]: Start difference. First operand 3163 states and 8778 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:32,457 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-06-05 18:20:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 18:20:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:32,461 INFO L225 Difference]: With dead ends: 4631 [2021-06-05 18:20:32,461 INFO L226 Difference]: Without dead ends: 4361 [2021-06-05 18:20:32,461 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 555.3ms TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 18:20:32,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-06-05 18:20:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-06-05 18:20:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7812789620018536) internal successors, (9003), 3237 states have internal predecessors, (9003), 0 states have call successors, (0), 0 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 18:20:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-06-05 18:20:32,513 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-06-05 18:20:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:32,513 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-06-05 18:20:32,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-06-05 18:20:32,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:32,515 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:32,515 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:32,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 18:20:32,715 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:32,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:32,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1087881263, now seen corresponding path program 177 times [2021-06-05 18:20:32,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:32,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337185558] [2021-06-05 18:20:32,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:32,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:32,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337185558] [2021-06-05 18:20:32,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337185558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:32,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101881930] [2021-06-05 18:20:32,914 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:32,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:32,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:32,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-05 18:20:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:33,164 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101881930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:33,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:33,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:33,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356166242] [2021-06-05 18:20:33,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:33,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:33,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:33,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:33,165 INFO L87 Difference]: Start difference. First operand 3238 states and 9003 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:33,804 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-06-05 18:20:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 18:20:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:33,808 INFO L225 Difference]: With dead ends: 4656 [2021-06-05 18:20:33,808 INFO L226 Difference]: Without dead ends: 4386 [2021-06-05 18:20:33,809 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 658.8ms TimeCoverageRelationStatistics Valid=755, Invalid=2551, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:20:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-06-05 18:20:33,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-06-05 18:20:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.786231884057971) internal successors, (9228), 3312 states have internal predecessors, (9228), 0 states have call successors, (0), 0 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 18:20:33,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-06-05 18:20:33,845 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-06-05 18:20:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:33,845 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-06-05 18:20:33,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-06-05 18:20:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:33,847 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:33,847 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:34,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:34,048 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash -209869345, now seen corresponding path program 178 times [2021-06-05 18:20:34,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:34,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588758164] [2021-06-05 18:20:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:34,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:34,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588758164] [2021-06-05 18:20:34,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588758164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:34,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833069157] [2021-06-05 18:20:34,245 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:34,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:34,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:34,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833069157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:34,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:34,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527809106] [2021-06-05 18:20:34,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:34,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:34,469 INFO L87 Difference]: Start difference. First operand 3313 states and 9228 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:35,037 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-06-05 18:20:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 18:20:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:35,041 INFO L225 Difference]: With dead ends: 4681 [2021-06-05 18:20:35,041 INFO L226 Difference]: Without dead ends: 4411 [2021-06-05 18:20:35,041 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 584.1ms TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 18:20:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-06-05 18:20:35,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-06-05 18:20:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7909654561558903) internal successors, (9453), 3387 states have internal predecessors, (9453), 0 states have call successors, (0), 0 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 18:20:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-06-05 18:20:35,078 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-06-05 18:20:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:35,078 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-06-05 18:20:35,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-06-05 18:20:35,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:35,081 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:35,081 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:35,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 18:20:35,281 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:35,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1109924145, now seen corresponding path program 179 times [2021-06-05 18:20:35,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:35,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058130154] [2021-06-05 18:20:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:35,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:35,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058130154] [2021-06-05 18:20:35,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058130154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:35,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725695886] [2021-06-05 18:20:35,483 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:35,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:35,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:35,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:35,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:35,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725695886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:35,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:35,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:35,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943859636] [2021-06-05 18:20:35,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:35,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:35,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:35,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:35,733 INFO L87 Difference]: Start difference. First operand 3388 states and 9453 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:36,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:36,414 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-06-05 18:20:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 18:20:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:36,419 INFO L225 Difference]: With dead ends: 4706 [2021-06-05 18:20:36,419 INFO L226 Difference]: Without dead ends: 4436 [2021-06-05 18:20:36,419 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=845, Invalid=2695, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:20:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-06-05 18:20:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-06-05 18:20:36,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7954939341421143) internal successors, (9678), 3462 states have internal predecessors, (9678), 0 states have call successors, (0), 0 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 18:20:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-06-05 18:20:36,457 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-06-05 18:20:36,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:36,457 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-06-05 18:20:36,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:36,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-06-05 18:20:36,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:36,460 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:36,460 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:36,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:36,661 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:36,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1538988451, now seen corresponding path program 180 times [2021-06-05 18:20:36,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:36,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790854741] [2021-06-05 18:20:36,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:36,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:36,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790854741] [2021-06-05 18:20:36,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790854741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:36,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340806717] [2021-06-05 18:20:36,846 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:36,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:36,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 18:20:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:37,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340806717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:37,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:37,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:37,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046171367] [2021-06-05 18:20:37,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:37,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:37,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:37,132 INFO L87 Difference]: Start difference. First operand 3463 states and 9678 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:37,757 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-06-05 18:20:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 18:20:37,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:37,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:37,762 INFO L225 Difference]: With dead ends: 4731 [2021-06-05 18:20:37,762 INFO L226 Difference]: Without dead ends: 4461 [2021-06-05 18:20:37,762 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 606.2ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 18:20:37,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-06-05 18:20:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-06-05 18:20:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.799830364715861) internal successors, (9903), 3537 states have internal predecessors, (9903), 0 states have call successors, (0), 0 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 18:20:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-06-05 18:20:37,804 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-06-05 18:20:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:37,804 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-06-05 18:20:37,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:37,805 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-06-05 18:20:37,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:37,807 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:37,807 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:38,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-06-05 18:20:38,009 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2069795661, now seen corresponding path program 181 times [2021-06-05 18:20:38,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:38,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137606069] [2021-06-05 18:20:38,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:38,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:38,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137606069] [2021-06-05 18:20:38,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137606069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:38,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690443389] [2021-06-05 18:20:38,251 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:38,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:38,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:38,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:38,496 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:38,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690443389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:38,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:38,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:38,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893281053] [2021-06-05 18:20:38,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:38,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:38,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:38,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:38,497 INFO L87 Difference]: Start difference. First operand 3538 states and 9903 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:39,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:39,276 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-06-05 18:20:39,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 18:20:39,277 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:39,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:39,281 INFO L225 Difference]: With dead ends: 4756 [2021-06-05 18:20:39,281 INFO L226 Difference]: Without dead ends: 4486 [2021-06-05 18:20:39,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 767.4ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:20:39,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-06-05 18:20:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-06-05 18:20:39,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.8039867109634553) internal successors, (10128), 3612 states have internal predecessors, (10128), 0 states have call successors, (0), 0 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 18:20:39,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-06-05 18:20:39,319 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-06-05 18:20:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:39,319 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-06-05 18:20:39,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-06-05 18:20:39,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:39,322 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:39,322 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:39,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:39,523 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:39,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1984760923, now seen corresponding path program 182 times [2021-06-05 18:20:39,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:39,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248997094] [2021-06-05 18:20:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:39,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:39,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248997094] [2021-06-05 18:20:39,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248997094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:39,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940477912] [2021-06-05 18:20:39,732 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:39,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 18:20:39,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:39,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940477912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:39,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:39,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:39,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657371617] [2021-06-05 18:20:39,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:39,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:39,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:39,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:39,998 INFO L87 Difference]: Start difference. First operand 3613 states and 10128 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:40,663 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-06-05 18:20:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 18:20:40,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:40,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:40,667 INFO L225 Difference]: With dead ends: 4781 [2021-06-05 18:20:40,667 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 18:20:40,668 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 656.9ms TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 18:20:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 18:20:40,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-06-05 18:20:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.807973962571196) internal successors, (10353), 3687 states have internal predecessors, (10353), 0 states have call successors, (0), 0 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 18:20:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-06-05 18:20:40,707 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-06-05 18:20:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:40,707 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-06-05 18:20:40,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-06-05 18:20:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:40,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:40,710 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:40,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:40,910 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:40,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1916609867, now seen corresponding path program 183 times [2021-06-05 18:20:40,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:40,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014413764] [2021-06-05 18:20:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:40,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:41,136 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:41,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:41,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014413764] [2021-06-05 18:20:41,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014413764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:41,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448112982] [2021-06-05 18:20:41,137 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:41,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-05 18:20:41,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:41,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 18:20:41,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:41,470 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448112982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:41,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:41,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:41,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042096507] [2021-06-05 18:20:41,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:41,470 INFO L87 Difference]: Start difference. First operand 3688 states and 10353 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:42,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:42,237 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-06-05 18:20:42,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 18:20:42,237 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:42,242 INFO L225 Difference]: With dead ends: 4806 [2021-06-05 18:20:42,242 INFO L226 Difference]: Without dead ends: 4536 [2021-06-05 18:20:42,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 782.5ms TimeCoverageRelationStatistics Valid=965, Invalid=3067, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:20:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-06-05 18:20:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-06-05 18:20:42,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.8118022328548644) internal successors, (10578), 3762 states have internal predecessors, (10578), 0 states have call successors, (0), 0 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 18:20:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-06-05 18:20:42,283 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-06-05 18:20:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:42,283 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-06-05 18:20:42,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-06-05 18:20:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:42,286 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:42,286 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:42,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:42,487 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:42,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:42,487 INFO L82 PathProgramCache]: Analyzing trace with hash 619640793, now seen corresponding path program 184 times [2021-06-05 18:20:42,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:42,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264764894] [2021-06-05 18:20:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:42,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:42,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264764894] [2021-06-05 18:20:42,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264764894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:42,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514203642] [2021-06-05 18:20:42,681 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:42,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 18:20:42,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:42,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:42,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514203642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:42,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:42,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:42,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458149932] [2021-06-05 18:20:42,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:42,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:42,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:42,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:42,903 INFO L87 Difference]: Start difference. First operand 3763 states and 10578 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:43,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:43,606 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-06-05 18:20:43,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 18:20:43,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:43,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:43,611 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 18:20:43,611 INFO L226 Difference]: Without dead ends: 4561 [2021-06-05 18:20:43,612 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 18:20:43,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-05 18:20:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-06-05 18:20:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.815480844409695) internal successors, (10803), 3837 states have internal predecessors, (10803), 0 states have call successors, (0), 0 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 18:20:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-06-05 18:20:43,655 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-06-05 18:20:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:43,655 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-06-05 18:20:43,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-06-05 18:20:43,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:43,658 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:43,658 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:43,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:43,859 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:43,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:43,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1049394377, now seen corresponding path program 185 times [2021-06-05 18:20:43,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:43,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167208693] [2021-06-05 18:20:43,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:44,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:44,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167208693] [2021-06-05 18:20:44,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167208693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:44,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826242403] [2021-06-05 18:20:44,078 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:44,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-05 18:20:44,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:44,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:44,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:44,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826242403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:44,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:44,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-06-05 18:20:44,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60011951] [2021-06-05 18:20:44,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 18:20:44,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:44,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 18:20:44,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-06-05 18:20:44,364 INFO L87 Difference]: Start difference. First operand 3838 states and 10803 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:45,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:45,235 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-06-05 18:20:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 18:20:45,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:45,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:45,240 INFO L225 Difference]: With dead ends: 4916 [2021-06-05 18:20:45,240 INFO L226 Difference]: Without dead ends: 4646 [2021-06-05 18:20:45,241 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 856.7ms TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:20:45,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-06-05 18:20:45,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-06-05 18:20:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.8241308793456033) internal successors, (11048), 3912 states have internal predecessors, (11048), 0 states have call successors, (0), 0 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 18:20:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-06-05 18:20:45,281 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-06-05 18:20:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:45,281 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-06-05 18:20:45,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 18:20:45,282 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-06-05 18:20:45,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:45,284 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:45,284 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:45,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable197 [2021-06-05 18:20:45,485 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash 991660247, now seen corresponding path program 186 times [2021-06-05 18:20:45,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:45,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163360186] [2021-06-05 18:20:45,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:45,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:45,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163360186] [2021-06-05 18:20:45,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163360186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:45,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845176105] [2021-06-05 18:20:45,669 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:45,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-05 18:20:45,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 18:20:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 18:20:45,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:45,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845176105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:45,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:45,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:45,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473160436] [2021-06-05 18:20:45,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:45,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:45,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:45,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:45,918 INFO L87 Difference]: Start difference. First operand 3913 states and 11048 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:46,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:46,657 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-06-05 18:20:46,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:20:46,657 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:46,663 INFO L225 Difference]: With dead ends: 5658 [2021-06-05 18:20:46,663 INFO L226 Difference]: Without dead ends: 5388 [2021-06-05 18:20:46,664 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 696.7ms TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 18:20:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-06-05 18:20:46,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-06-05 18:20:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.8365102639296187) internal successors, (11607), 4092 states have internal predecessors, (11607), 0 states have call successors, (0), 0 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 18:20:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-06-05 18:20:46,717 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-06-05 18:20:46,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:46,717 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-06-05 18:20:46,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:46,717 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-06-05 18:20:46,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-06-05 18:20:46,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:46,720 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:46,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:46,925 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:46,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1014003497, now seen corresponding path program 187 times [2021-06-05 18:20:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727028047] [2021-06-05 18:20:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:47,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 18:20:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727028047] [2021-06-05 18:20:47,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727028047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:47,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107907266] [2021-06-05 18:20:47,121 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 18:20:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 18:20:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 18:20:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 18:20:47,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107907266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 18:20:47,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 18:20:47,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-06-05 18:20:47,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842682110] [2021-06-05 18:20:47,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 18:20:47,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 18:20:47,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 18:20:47,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-06-05 18:20:47,341 INFO L87 Difference]: Start difference. First operand 4093 states and 11607 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 18:20:48,238 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-06-05 18:20:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 18:20:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 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 125 [2021-06-05 18:20:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 18:20:48,243 INFO L225 Difference]: With dead ends: 5120 [2021-06-05 18:20:48,243 INFO L226 Difference]: Without dead ends: 4631 [2021-06-05 18:20:48,244 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 865.0ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 18:20:48,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-06-05 18:20:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-06-05 18:20:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 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 18:20:48,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-06-05 18:20:48,278 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-06-05 18:20:48,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 18:20:48,278 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-06-05 18:20:48,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 18:20:48,279 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-06-05 18:20:48,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-06-05 18:20:48,281 INFO L546 BasicCegarLoop]: Found error trace [2021-06-05 18:20:48,281 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:20:48,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 18:20:48,481 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-06-05 18:20:48,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 18:20:48,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1934097443, now seen corresponding path program 188 times [2021-06-05 18:20:48,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 18:20:48,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672530228] [2021-06-05 18:20:48,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 18:20:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 18:20:48,489 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 18:20:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 18:20:48,501 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 18:20:48,562 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 18:20:48,562 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 18:20:48,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2021-06-05 18:20:48,565 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 18:20:48,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:20:48 BasicIcfg [2021-06-05 18:20:48,686 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 18:20:48,686 INFO L168 Benchmark]: Toolchain (without parser) took 199630.06 ms. Allocated memory was 352.3 MB in the beginning and 960.5 MB in the end (delta: 608.2 MB). Free memory was 314.9 MB in the beginning and 747.6 MB in the end (delta: -432.7 MB). Peak memory consumption was 176.9 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:48,687 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 352.3 MB. Free memory is still 333.2 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:20:48,687 INFO L168 Benchmark]: CACSL2BoogieTranslator took 474.57 ms. Allocated memory is still 352.3 MB. Free memory was 314.7 MB in the beginning and 315.2 MB in the end (delta: -512.5 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:48,687 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.11 ms. Allocated memory is still 352.3 MB. Free memory was 315.2 MB in the beginning and 313.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:48,687 INFO L168 Benchmark]: Boogie Preprocessor took 18.75 ms. Allocated memory is still 352.3 MB. Free memory was 313.1 MB in the beginning and 312.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 18:20:48,687 INFO L168 Benchmark]: RCFGBuilder took 424.89 ms. Allocated memory is still 352.3 MB. Free memory was 312.0 MB in the beginning and 290.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:48,687 INFO L168 Benchmark]: TraceAbstraction took 198674.68 ms. Allocated memory was 352.3 MB in the beginning and 960.5 MB in the end (delta: 608.2 MB). Free memory was 290.0 MB in the beginning and 747.6 MB in the end (delta: -457.6 MB). Peak memory consumption was 152.7 MB. Max. memory is 16.0 GB. [2021-06-05 18:20:48,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 352.3 MB. Free memory is still 333.2 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 474.57 ms. Allocated memory is still 352.3 MB. Free memory was 314.7 MB in the beginning and 315.2 MB in the end (delta: -512.5 kB). Peak memory consumption was 7.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 29.11 ms. Allocated memory is still 352.3 MB. Free memory was 315.2 MB in the beginning and 313.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.75 ms. Allocated memory is still 352.3 MB. Free memory was 313.1 MB in the beginning and 312.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 424.89 ms. Allocated memory is still 352.3 MB. Free memory was 312.0 MB in the beginning and 290.0 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 198674.68 ms. Allocated memory was 352.3 MB in the beginning and 960.5 MB in the end (delta: 608.2 MB). Free memory was 290.0 MB in the beginning and 747.6 MB in the end (delta: -457.6 MB). Peak memory consumption was 152.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1, k++=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1, k++=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2, k++=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2, k++=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3, k++=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3, k++=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4, k++=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4, k++=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5, k++=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5, k++=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6, k++=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6, k++=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7, k++=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7, k++=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8, k++=7] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8, k++=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9, k++=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9, k++=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 198461.8ms, OverallIterations: 199, TraceHistogramMax: 10, EmptinessCheckTime: 462.1ms, AutomataDifference: 83040.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 88.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19280 SDtfs, 138048 SDslu, 163730 SDs, 0 SdLazy, 29660 SolverSat, 19814 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16754.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26094 GetRequests, 18209 SyntacticMatches, 0 SemanticMatches, 7885 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81942 ImplicationChecksByTransitivity, 80622.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4093occurred in iteration=197, InterpolantAutomatonStates: 5910, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 6533.8ms AutomataMinimizationTime, 198 MinimizatonAttempts, 158615 StatesRemovedByMinimization, 198 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2312.8ms SsaConstructionTime, 5218.1ms SatisfiabilityAnalysisTime, 54100.2ms InterpolantComputationTime, 36874 NumberOfCodeBlocks, 36870 NumberOfCodeBlocksAsserted, 1046 NumberOfCheckSat, 36355 ConstructedInterpolants, 0 QuantifiedInterpolants, 150351 SizeOfPredicates, 2683 NumberOfNonLiveVariables, 38348 ConjunctsInSsa, 3790 ConjunctsInUnsatCore, 389 InterpolantComputations, 7 PerfectInterpolantSequences, 40/65960 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 proved your program to be incorrect! Received shutdown request...