/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:55:57,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:55:57,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:55:57,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:55:57,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 21:55:57,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 21:55:57,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 21:55:57,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 21:55:57,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 21:55:57,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 21:55:57,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 21:55:57,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 21:55:57,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 21:55:57,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 21:55:57,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 21:55:57,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 21:55:57,695 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 21:55:57,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:55:57,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:55:57,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:55:57,700 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-Separate.epf [2021-05-21 21:55:57,713 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:55:57,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:55:57,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:55:57,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:55:57,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:55:57,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:55:57,714 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:55:57,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:55:57,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:55:57,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:55:57,715 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:55:57,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-21 21:55:57,716 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:55:57,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:55:57,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:55:57,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:55:57,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 21:55:57,950 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 21:55:57,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2021-05-21 21:55:57,988 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e097f0c74/0ccea7afc1ad438095878d3bae44fe38/FLAGcfd0029e5 [2021-05-21 21:55:58,393 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 21:55:58,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2021-05-21 21:55:58,404 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e097f0c74/0ccea7afc1ad438095878d3bae44fe38/FLAGcfd0029e5 [2021-05-21 21:55:58,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e097f0c74/0ccea7afc1ad438095878d3bae44fe38 [2021-05-21 21:55:58,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:55:58,738 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 21:55:58,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 21:55:58,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 21:55:58,742 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 21:55:58,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:55:58" (1/1) ... [2021-05-21 21:55:58,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aa46f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:58, skipping insertion in model container [2021-05-21 21:55:58,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 09:55:58" (1/1) ... [2021-05-21 21:55:58,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 21:55:58,780 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 21:55:59,013 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-2.i[30952,30965] [2021-05-21 21:55:59,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:55:59,022 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 21:55:59,059 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-2.i[30952,30965] [2021-05-21 21:55:59,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 21:55:59,110 INFO L208 MainTranslator]: Completed translation [2021-05-21 21:55:59,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59 WrapperNode [2021-05-21 21:55:59,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 21:55:59,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:55:59,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:55:59,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:55:59,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,153 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:55:59,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:55:59,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:55:59,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:55:59,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,177 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... [2021-05-21 21:55:59,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:55:59,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:55:59,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:55:59,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:55:59,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:55:59,246 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 21:55:59,247 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 21:55:59,247 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 21:55:59,247 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 21:55:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 21:55:59,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 21:55:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 21:55:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 21:55:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 21:55:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 21:55:59,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:55:59,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:55:59,250 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:55:59,468 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:55:59,468 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 21:55:59,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:55:59 BoogieIcfgContainer [2021-05-21 21:55:59,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:55:59,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:55:59,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:55:59,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:55:59,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 09:55:58" (1/3) ... [2021-05-21 21:55:59,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1781efb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:55:59, skipping insertion in model container [2021-05-21 21:55:59,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 09:55:59" (2/3) ... [2021-05-21 21:55:59,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1781efb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:55:59, skipping insertion in model container [2021-05-21 21:55:59,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:55:59" (3/3) ... [2021-05-21 21:55:59,475 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2021-05-21 21:55:59,478 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:55:59,478 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:55:59,478 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:55:59,479 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:55:59,498 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,502 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,505 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,507 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,507 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,507 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,507 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,507 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,508 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,511 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,511 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,511 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,511 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 21:55:59,512 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 21:55:59,525 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-21 21:55:59,537 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:55:59,537 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:55:59,537 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:55:59,537 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:55:59,537 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:55:59,537 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:55:59,537 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:55:59,537 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:55:59,543 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-05-21 21:55:59,618 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) [2021-05-21 21:55:59,621 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) [2021-05-21 21:55:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:55:59,632 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:55:59,633 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:55:59,633 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:55:59,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:55:59,636 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-05-21 21:55:59,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:55:59,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322970865] [2021-05-21 21:55:59,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:55:59,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:55:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:55:59,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:55:59,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322970865] [2021-05-21 21:55:59,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322970865] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:55:59,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:55:59,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:55:59,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648234914] [2021-05-21 21:55:59,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:55:59,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:55:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:55:59,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:55:59,887 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) [2021-05-21 21:55:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:55:59,980 INFO L93 Difference]: Finished difference Result 3294 states and 9568 transitions. [2021-05-21 21:55:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:55:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:55:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:55:59,993 INFO L225 Difference]: With dead ends: 3294 [2021-05-21 21:55:59,993 INFO L226 Difference]: Without dead ends: 1248 [2021-05-21 21:55:59,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:56:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-05-21 21:56:00,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-05-21 21:56:00,061 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) [2021-05-21 21:56:00,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-05-21 21:56:00,064 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-05-21 21:56:00,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:00,064 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-05-21 21:56:00,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:00,064 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-05-21 21:56:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:56:00,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:00,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:00,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:56:00,069 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:00,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-05-21 21:56:00,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:00,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849384419] [2021-05-21 21:56:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:00,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:00,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849384419] [2021-05-21 21:56:00,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849384419] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:56:00,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:56:00,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:56:00,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373457070] [2021-05-21 21:56:00,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:56:00,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:00,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:56:00,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:56:00,201 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) [2021-05-21 21:56:00,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:00,293 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-05-21 21:56:00,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:56:00,294 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 [2021-05-21 21:56:00,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:00,299 INFO L225 Difference]: With dead ends: 1302 [2021-05-21 21:56:00,299 INFO L226 Difference]: Without dead ends: 920 [2021-05-21 21:56:00,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:56:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-21 21:56:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-05-21 21:56:00,318 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) [2021-05-21 21:56:00,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-05-21 21:56:00,322 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-05-21 21:56:00,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:00,322 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-05-21 21:56:00,322 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) [2021-05-21 21:56:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-05-21 21:56:00,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:56:00,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:00,324 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:00,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:56:00,324 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:00,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:00,324 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-05-21 21:56:00,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:00,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405335259] [2021-05-21 21:56:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:00,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:00,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:00,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405335259] [2021-05-21 21:56:00,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405335259] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:56:00,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:56:00,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:56:00,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675130144] [2021-05-21 21:56:00,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:56:00,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:00,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:56:00,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:56:00,425 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) [2021-05-21 21:56:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:00,493 INFO L93 Difference]: Finished difference Result 1332 states and 3512 transitions. [2021-05-21 21:56:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 21:56:00,493 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 [2021-05-21 21:56:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:00,497 INFO L225 Difference]: With dead ends: 1332 [2021-05-21 21:56:00,497 INFO L226 Difference]: Without dead ends: 1072 [2021-05-21 21:56:00,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:56:00,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-05-21 21:56:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 876. [2021-05-21 21:56:00,511 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) [2021-05-21 21:56:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-05-21 21:56:00,533 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-05-21 21:56:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:00,534 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-05-21 21:56:00,534 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) [2021-05-21 21:56:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-05-21 21:56:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:56:00,536 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:00,536 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:00,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:56:00,536 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:00,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:00,537 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-05-21 21:56:00,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:00,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329379414] [2021-05-21 21:56:00,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:00,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:00,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329379414] [2021-05-21 21:56:00,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329379414] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:56:00,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:56:00,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 21:56:00,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858673840] [2021-05-21 21:56:00,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:56:00,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:00,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:56:00,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:56:00,643 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) [2021-05-21 21:56:00,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:00,718 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-05-21 21:56:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:56:00,722 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 [2021-05-21 21:56:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:00,726 INFO L225 Difference]: With dead ends: 1772 [2021-05-21 21:56:00,726 INFO L226 Difference]: Without dead ends: 1505 [2021-05-21 21:56:00,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-05-21 21:56:00,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-05-21 21:56:00,745 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) [2021-05-21 21:56:00,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-05-21 21:56:00,747 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-05-21 21:56:00,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:00,749 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-05-21 21:56:00,749 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) [2021-05-21 21:56:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-05-21 21:56:00,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:56:00,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:00,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:00,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:56:00,750 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:00,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:00,750 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-05-21 21:56:00,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:00,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42677355] [2021-05-21 21:56:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:00,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:00,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42677355] [2021-05-21 21:56:00,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42677355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:56:00,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:56:00,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:56:00,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251611591] [2021-05-21 21:56:00,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:56:00,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:56:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:56:00,802 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) [2021-05-21 21:56:00,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:00,873 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-05-21 21:56:00,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:56:00,873 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 [2021-05-21 21:56:00,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:00,879 INFO L225 Difference]: With dead ends: 2211 [2021-05-21 21:56:00,879 INFO L226 Difference]: Without dead ends: 1944 [2021-05-21 21:56:00,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:56:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-05-21 21:56:00,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-05-21 21:56:00,904 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) [2021-05-21 21:56:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-05-21 21:56:00,906 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-05-21 21:56:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:00,907 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-05-21 21:56:00,907 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) [2021-05-21 21:56:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-05-21 21:56:00,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:56:00,908 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:00,908 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:00,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:56:00,908 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:00,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:00,908 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-05-21 21:56:00,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:00,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500540852] [2021-05-21 21:56:00,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:00,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:00,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:00,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500540852] [2021-05-21 21:56:00,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500540852] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:56:00,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:56:00,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 21:56:00,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346303327] [2021-05-21 21:56:00,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 21:56:00,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:00,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 21:56:00,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:56:00,953 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) [2021-05-21 21:56:01,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:01,036 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-05-21 21:56:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:56:01,037 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 [2021-05-21 21:56:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:01,040 INFO L225 Difference]: With dead ends: 1519 [2021-05-21 21:56:01,040 INFO L226 Difference]: Without dead ends: 1138 [2021-05-21 21:56:01,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-21 21:56:01,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-05-21 21:56:01,054 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) [2021-05-21 21:56:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-05-21 21:56:01,056 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-05-21 21:56:01,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:01,056 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-05-21 21:56:01,056 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) [2021-05-21 21:56:01,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-05-21 21:56:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:56:01,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:01,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:01,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 21:56:01,057 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:01,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-05-21 21:56:01,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:01,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038369097] [2021-05-21 21:56:01,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:01,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:01,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038369097] [2021-05-21 21:56:01,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038369097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:01,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698056477] [2021-05-21 21:56:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:56:01,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:01,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698056477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:01,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:01,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:56:01,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961079420] [2021-05-21 21:56:01,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:56:01,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:01,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:56:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:56:01,326 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 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) [2021-05-21 21:56:01,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:01,451 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-05-21 21:56:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:56:01,451 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 45 [2021-05-21 21:56:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:01,455 INFO L225 Difference]: With dead ends: 1451 [2021-05-21 21:56:01,455 INFO L226 Difference]: Without dead ends: 1181 [2021-05-21 21:56:01,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:56:01,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-05-21 21:56:01,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-05-21 21:56:01,472 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) [2021-05-21 21:56:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-05-21 21:56:01,474 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-05-21 21:56:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:01,474 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-05-21 21:56:01,474 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) [2021-05-21 21:56:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-05-21 21:56:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:56:01,475 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:01,475 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:01,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-21 21:56:01,693 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:01,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-05-21 21:56:01,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:01,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706006269] [2021-05-21 21:56:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:01,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:01,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:01,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706006269] [2021-05-21 21:56:01,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706006269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:01,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235446426] [2021-05-21 21:56:01,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:01,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:01,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:56:01,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:01,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235446426] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:01,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:01,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 21:56:01,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138260581] [2021-05-21 21:56:01,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 21:56:01,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 21:56:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:56:01,903 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) [2021-05-21 21:56:02,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:02,007 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-05-21 21:56:02,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:56:02,008 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 [2021-05-21 21:56:02,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:02,014 INFO L225 Difference]: With dead ends: 2333 [2021-05-21 21:56:02,014 INFO L226 Difference]: Without dead ends: 2063 [2021-05-21 21:56:02,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:56:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-05-21 21:56:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-05-21 21:56:02,036 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) [2021-05-21 21:56:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-05-21 21:56:02,039 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-05-21 21:56:02,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:02,041 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-05-21 21:56:02,041 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) [2021-05-21 21:56:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-05-21 21:56:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:56:02,042 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:02,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:02,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:02,253 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:02,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:02,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-05-21 21:56:02,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:02,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363800335] [2021-05-21 21:56:02,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:02,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:02,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363800335] [2021-05-21 21:56:02,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363800335] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:02,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294835249] [2021-05-21 21:56:02,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:02,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 21:56:02,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:02,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:56:02,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:02,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294835249] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:02,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:02,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:56:02,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334531119] [2021-05-21 21:56:02,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:56:02,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:02,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:56:02,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:56:02,417 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) [2021-05-21 21:56:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:02,611 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-05-21 21:56:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:56:02,612 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 [2021-05-21 21:56:02,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:02,616 INFO L225 Difference]: With dead ends: 2121 [2021-05-21 21:56:02,616 INFO L226 Difference]: Without dead ends: 1546 [2021-05-21 21:56:02,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:56:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-05-21 21:56:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-05-21 21:56:02,635 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) [2021-05-21 21:56:02,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-05-21 21:56:02,639 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-05-21 21:56:02,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:02,639 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-05-21 21:56:02,639 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) [2021-05-21 21:56:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-05-21 21:56:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 21:56:02,640 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:02,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:02,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:02,853 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-05-21 21:56:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:02,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119311629] [2021-05-21 21:56:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:02,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:02,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119311629] [2021-05-21 21:56:02,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119311629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:02,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176878838] [2021-05-21 21:56:02,894 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 [2021-05-21 21:56:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:02,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:56:02,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:03,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176878838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:03,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:03,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 21:56:03,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65647130] [2021-05-21 21:56:03,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:56:03,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:03,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:56:03,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:56:03,022 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) [2021-05-21 21:56:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:03,140 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-05-21 21:56:03,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:56:03,140 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 [2021-05-21 21:56:03,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:03,146 INFO L225 Difference]: With dead ends: 2398 [2021-05-21 21:56:03,146 INFO L226 Difference]: Without dead ends: 1926 [2021-05-21 21:56:03,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-21 21:56:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-21 21:56:03,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-05-21 21:56:03,167 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) [2021-05-21 21:56:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-05-21 21:56:03,169 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-05-21 21:56:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:03,169 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-05-21 21:56:03,170 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) [2021-05-21 21:56:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-05-21 21:56:03,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:03,171 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:03,171 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:03,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:03,387 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:03,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:03,387 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-05-21 21:56:03,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:03,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678248593] [2021-05-21 21:56:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:03,454 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:03,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:03,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678248593] [2021-05-21 21:56:03,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678248593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:03,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677624704] [2021-05-21 21:56:03,455 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 [2021-05-21 21:56:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:03,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:56:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:03,633 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:03,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677624704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:03,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:03,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:56:03,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621621731] [2021-05-21 21:56:03,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:56:03,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:03,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:56:03,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:56:03,634 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 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) [2021-05-21 21:56:03,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:03,759 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-05-21 21:56:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:56:03,759 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 55 [2021-05-21 21:56:03,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:03,764 INFO L225 Difference]: With dead ends: 1866 [2021-05-21 21:56:03,764 INFO L226 Difference]: Without dead ends: 1596 [2021-05-21 21:56:03,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:56:03,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-05-21 21:56:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-05-21 21:56:03,782 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) [2021-05-21 21:56:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 21:56:03,785 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 21:56:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:03,785 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 21:56:03,785 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) [2021-05-21 21:56:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 21:56:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:03,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:03,786 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:04,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-21 21:56:04,004 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:04,005 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-05-21 21:56:04,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:04,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962459766] [2021-05-21 21:56:04,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:04,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:04,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962459766] [2021-05-21 21:56:04,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962459766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:04,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508187902] [2021-05-21 21:56:04,083 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 [2021-05-21 21:56:04,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:04,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:56:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:04,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:04,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508187902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:04,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:04,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 21:56:04,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780066546] [2021-05-21 21:56:04,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:56:04,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:04,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:56:04,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:56:04,203 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) [2021-05-21 21:56:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:04,321 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-05-21 21:56:04,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:56:04,321 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 [2021-05-21 21:56:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:04,330 INFO L225 Difference]: With dead ends: 1981 [2021-05-21 21:56:04,330 INFO L226 Difference]: Without dead ends: 1711 [2021-05-21 21:56:04,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:56:04,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-05-21 21:56:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-05-21 21:56:04,349 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) [2021-05-21 21:56:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 21:56:04,352 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 21:56:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:04,352 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 21:56:04,352 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) [2021-05-21 21:56:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 21:56:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:04,354 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:04,354 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:04,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:04,571 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:04,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:04,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-05-21 21:56:04,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:04,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177433761] [2021-05-21 21:56:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:04,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:04,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177433761] [2021-05-21 21:56:04,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177433761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:04,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534759451] [2021-05-21 21:56:04,637 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 [2021-05-21 21:56:04,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:56:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:04,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:04,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534759451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:04,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:04,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:56:04,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746254082] [2021-05-21 21:56:04,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:56:04,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:04,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:56:04,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:56:04,768 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:04,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:04,975 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-05-21 21:56:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:56:04,975 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:56:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:04,979 INFO L225 Difference]: With dead ends: 2669 [2021-05-21 21:56:04,979 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 21:56:04,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:56:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 21:56:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-05-21 21:56:05,000 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) [2021-05-21 21:56:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-05-21 21:56:05,002 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-05-21 21:56:05,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:05,003 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-05-21 21:56:05,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-05-21 21:56:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:05,005 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:05,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:05,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 21:56:05,221 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:05,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-05-21 21:56:05,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:05,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296732136] [2021-05-21 21:56:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:05,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:05,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296732136] [2021-05-21 21:56:05,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296732136] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:05,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806076226] [2021-05-21 21:56:05,283 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 [2021-05-21 21:56:05,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:56:05,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:05,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:56:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:05,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806076226] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:05,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:05,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 21:56:05,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159118610] [2021-05-21 21:56:05,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:56:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:05,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:56:05,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:56:05,407 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 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) [2021-05-21 21:56:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:05,569 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-05-21 21:56:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:56:05,570 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 [2021-05-21 21:56:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:05,574 INFO L225 Difference]: With dead ends: 2878 [2021-05-21 21:56:05,574 INFO L226 Difference]: Without dead ends: 2608 [2021-05-21 21:56:05,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:56:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-05-21 21:56:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-05-21 21:56:05,600 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) [2021-05-21 21:56:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-05-21 21:56:05,603 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-05-21 21:56:05,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:05,603 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-05-21 21:56:05,603 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) [2021-05-21 21:56:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-05-21 21:56:05,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:05,605 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:05,605 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:05,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:56:05,825 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:05,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-05-21 21:56:05,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:05,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061170182] [2021-05-21 21:56:05,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:05,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:05,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061170182] [2021-05-21 21:56:05,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061170182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:05,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147138016] [2021-05-21 21:56:05,880 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 [2021-05-21 21:56:05,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:56:05,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:05,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:56:05,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:06,008 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:06,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147138016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:06,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:06,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:56:06,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646267712] [2021-05-21 21:56:06,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:56:06,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:06,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:56:06,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:56:06,010 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) [2021-05-21 21:56:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:06,265 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-05-21 21:56:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:56:06,265 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 [2021-05-21 21:56:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:06,269 INFO L225 Difference]: With dead ends: 2821 [2021-05-21 21:56:06,269 INFO L226 Difference]: Without dead ends: 2246 [2021-05-21 21:56:06,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 211.6ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:56:06,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-05-21 21:56:06,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-05-21 21:56:06,311 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) [2021-05-21 21:56:06,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-05-21 21:56:06,314 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-05-21 21:56:06,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:06,314 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-05-21 21:56:06,314 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) [2021-05-21 21:56:06,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-05-21 21:56:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:06,315 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:06,315 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:06,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 21:56:06,530 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:06,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:06,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-05-21 21:56:06,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:06,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825068751] [2021-05-21 21:56:06,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:06,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:06,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825068751] [2021-05-21 21:56:06,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825068751] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:06,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308738966] [2021-05-21 21:56:06,589 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 [2021-05-21 21:56:06,637 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 21:56:06,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:06,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:56:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:06,744 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:06,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308738966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:06,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:06,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-05-21 21:56:06,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966058893] [2021-05-21 21:56:06,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:06,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:06,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:06,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:06,745 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:06,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:06,874 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-05-21 21:56:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:56:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 21:56:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:06,878 INFO L225 Difference]: With dead ends: 2561 [2021-05-21 21:56:06,878 INFO L226 Difference]: Without dead ends: 2212 [2021-05-21 21:56:06,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:56:06,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-05-21 21:56:06,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-05-21 21:56:06,901 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) [2021-05-21 21:56:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-05-21 21:56:06,904 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-05-21 21:56:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:06,904 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-05-21 21:56:06,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 6.538461538461538) internal successors, (85), 13 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-05-21 21:56:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:06,906 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:06,906 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:07,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:56:07,123 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:07,124 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-05-21 21:56:07,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:07,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851506165] [2021-05-21 21:56:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:07,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:07,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851506165] [2021-05-21 21:56:07,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851506165] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:07,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754507030] [2021-05-21 21:56:07,181 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 [2021-05-21 21:56:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:07,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:56:07,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:07,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754507030] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:07,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:07,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 21:56:07,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252845816] [2021-05-21 21:56:07,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:56:07,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:07,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:56:07,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:56:07,300 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 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) [2021-05-21 21:56:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:07,385 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-05-21 21:56:07,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:56:07,385 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 [2021-05-21 21:56:07,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:07,388 INFO L225 Difference]: With dead ends: 2311 [2021-05-21 21:56:07,388 INFO L226 Difference]: Without dead ends: 2026 [2021-05-21 21:56:07,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:56:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-05-21 21:56:07,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-05-21 21:56:07,407 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) [2021-05-21 21:56:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-05-21 21:56:07,410 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-05-21 21:56:07,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:07,410 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-05-21 21:56:07,410 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) [2021-05-21 21:56:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-05-21 21:56:07,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:07,411 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:07,411 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:07,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 21:56:07,617 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-05-21 21:56:07,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:07,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328404633] [2021-05-21 21:56:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:07,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:07,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:07,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328404633] [2021-05-21 21:56:07,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328404633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:07,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943946502] [2021-05-21 21:56:07,663 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 [2021-05-21 21:56:07,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:07,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:07,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:56:07,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:07,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943946502] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:07,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:07,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-21 21:56:07,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563108549] [2021-05-21 21:56:07,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:56:07,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:56:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:56:07,796 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:07,961 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-05-21 21:56:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:56:07,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:56:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:07,964 INFO L225 Difference]: With dead ends: 2246 [2021-05-21 21:56:07,964 INFO L226 Difference]: Without dead ends: 1961 [2021-05-21 21:56:07,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:56:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-05-21 21:56:07,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-05-21 21:56:07,983 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) [2021-05-21 21:56:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-05-21 21:56:07,985 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-05-21 21:56:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:07,985 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-05-21 21:56:07,985 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-05-21 21:56:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 21:56:07,987 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:07,987 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:56:08,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:08,201 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:08,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-05-21 21:56:08,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:08,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887474380] [2021-05-21 21:56:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:08,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887474380] [2021-05-21 21:56:08,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887474380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:08,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581996000] [2021-05-21 21:56:08,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:08,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:56:08,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:56:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:08,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581996000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:08,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:08,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 21:56:08,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317999734] [2021-05-21 21:56:08,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:56:08,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:08,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:56:08,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:56:08,367 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 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) [2021-05-21 21:56:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:08,604 INFO L93 Difference]: Finished difference Result 3288 states and 8870 transitions. [2021-05-21 21:56:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:56:08,604 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 [2021-05-21 21:56:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:08,608 INFO L225 Difference]: With dead ends: 3288 [2021-05-21 21:56:08,608 INFO L226 Difference]: Without dead ends: 2476 [2021-05-21 21:56:08,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:56:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-05-21 21:56:08,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-05-21 21:56:08,632 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) [2021-05-21 21:56:08,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-05-21 21:56:08,634 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-05-21 21:56:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:08,634 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-05-21 21:56:08,634 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) [2021-05-21 21:56:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-05-21 21:56:08,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:08,636 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:08,636 INFO L521 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] [2021-05-21 21:56:08,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-05-21 21:56:08,849 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-05-21 21:56:08,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:08,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804925206] [2021-05-21 21:56:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:08,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:08,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804925206] [2021-05-21 21:56:08,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804925206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:08,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271399649] [2021-05-21 21:56:08,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:08,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:56:08,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:09,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271399649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:09,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:09,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:56:09,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071015673] [2021-05-21 21:56:09,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:09,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:09,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:09,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:09,065 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 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) [2021-05-21 21:56:09,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:09,235 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-05-21 21:56:09,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:56:09,236 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 65 [2021-05-21 21:56:09,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:09,238 INFO L225 Difference]: With dead ends: 2316 [2021-05-21 21:56:09,238 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 21:56:09,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:56:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 21:56:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-05-21 21:56:09,257 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) [2021-05-21 21:56:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:56:09,260 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:56:09,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:09,260 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:56:09,260 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) [2021-05-21 21:56:09,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:56:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:09,262 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:09,262 INFO L521 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] [2021-05-21 21:56:09,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:09,477 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-05-21 21:56:09,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:09,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674511232] [2021-05-21 21:56:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:09,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:09,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:09,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674511232] [2021-05-21 21:56:09,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674511232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:09,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743466055] [2021-05-21 21:56:09,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:09,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:56:09,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:09,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:09,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743466055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:09,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:09,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 21:56:09,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61154334] [2021-05-21 21:56:09,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:09,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:09,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:09,671 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) [2021-05-21 21:56:09,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:09,825 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-05-21 21:56:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:56:09,826 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 [2021-05-21 21:56:09,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:09,829 INFO L225 Difference]: With dead ends: 2481 [2021-05-21 21:56:09,829 INFO L226 Difference]: Without dead ends: 2211 [2021-05-21 21:56:09,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:56:09,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-21 21:56:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-05-21 21:56:09,849 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) [2021-05-21 21:56:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:56:09,851 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:56:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:09,852 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:56:09,852 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) [2021-05-21 21:56:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:56:09,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:09,854 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:09,854 INFO L521 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] [2021-05-21 21:56:10,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-21 21:56:10,070 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:10,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:10,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-05-21 21:56:10,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:10,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229838524] [2021-05-21 21:56:10,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:10,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:10,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229838524] [2021-05-21 21:56:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229838524] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139376627] [2021-05-21 21:56:10,144 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 [2021-05-21 21:56:10,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:56:10,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:10,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:10,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139376627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:10,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:10,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:56:10,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068465700] [2021-05-21 21:56:10,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:10,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:10,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:10,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:10,277 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) [2021-05-21 21:56:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:10,482 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-05-21 21:56:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:56:10,482 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 [2021-05-21 21:56:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:10,485 INFO L225 Difference]: With dead ends: 2566 [2021-05-21 21:56:10,485 INFO L226 Difference]: Without dead ends: 2296 [2021-05-21 21:56:10,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:56:10,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-05-21 21:56:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-05-21 21:56:10,529 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) [2021-05-21 21:56:10,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:56:10,532 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:56:10,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:10,532 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:56:10,533 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) [2021-05-21 21:56:10,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:56:10,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:10,535 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:10,535 INFO L521 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] [2021-05-21 21:56:10,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:10,752 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:10,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-05-21 21:56:10,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:10,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350839612] [2021-05-21 21:56:10,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:10,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350839612] [2021-05-21 21:56:10,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350839612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:10,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132426946] [2021-05-21 21:56:10,817 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 [2021-05-21 21:56:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:10,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:10,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132426946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:10,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:10,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 21:56:10,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144427790] [2021-05-21 21:56:10,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:10,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:10,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:10,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:10,931 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) [2021-05-21 21:56:11,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:11,130 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-05-21 21:56:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:56:11,130 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 [2021-05-21 21:56:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:11,134 INFO L225 Difference]: With dead ends: 2496 [2021-05-21 21:56:11,134 INFO L226 Difference]: Without dead ends: 2226 [2021-05-21 21:56:11,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:56:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-05-21 21:56:11,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-05-21 21:56:11,153 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) [2021-05-21 21:56:11,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 21:56:11,155 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 21:56:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:11,155 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 21:56:11,155 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) [2021-05-21 21:56:11,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 21:56:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:11,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:11,158 INFO L521 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] [2021-05-21 21:56:11,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-21 21:56:11,365 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:11,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:11,365 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-05-21 21:56:11,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:11,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756558797] [2021-05-21 21:56:11,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:11,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:11,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756558797] [2021-05-21 21:56:11,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756558797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:11,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619446528] [2021-05-21 21:56:11,441 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 [2021-05-21 21:56:11,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:11,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:11,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619446528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:11,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:11,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:56:11,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165400284] [2021-05-21 21:56:11,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:11,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:11,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:11,601 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) [2021-05-21 21:56:11,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:11,895 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-05-21 21:56:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:56:11,895 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 [2021-05-21 21:56:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:11,899 INFO L225 Difference]: With dead ends: 3074 [2021-05-21 21:56:11,899 INFO L226 Difference]: Without dead ends: 2451 [2021-05-21 21:56:11,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:56:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-05-21 21:56:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-05-21 21:56:11,939 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) [2021-05-21 21:56:11,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-05-21 21:56:11,942 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-05-21 21:56:11,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:11,943 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-05-21 21:56:11,943 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) [2021-05-21 21:56:11,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-05-21 21:56:11,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:11,946 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:11,946 INFO L521 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] [2021-05-21 21:56:12,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:56:12,161 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:12,161 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-05-21 21:56:12,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:12,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517466321] [2021-05-21 21:56:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:12,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:12,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517466321] [2021-05-21 21:56:12,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517466321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:12,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272109407] [2021-05-21 21:56:12,224 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 [2021-05-21 21:56:12,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:56:12,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:12,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:12,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272109407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:12,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:12,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 21:56:12,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354074562] [2021-05-21 21:56:12,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:12,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:12,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:12,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:12,365 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) [2021-05-21 21:56:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:12,590 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-05-21 21:56:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:56:12,590 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 [2021-05-21 21:56:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:12,594 INFO L225 Difference]: With dead ends: 3278 [2021-05-21 21:56:12,594 INFO L226 Difference]: Without dead ends: 3008 [2021-05-21 21:56:12,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:56:12,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-05-21 21:56:12,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-05-21 21:56:12,620 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) [2021-05-21 21:56:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-05-21 21:56:12,622 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-05-21 21:56:12,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:12,623 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-05-21 21:56:12,623 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) [2021-05-21 21:56:12,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-05-21 21:56:12,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:12,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:12,625 INFO L521 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] [2021-05-21 21:56:12,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:56:12,840 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:12,840 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-05-21 21:56:12,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:12,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542761190] [2021-05-21 21:56:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:12,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:12,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542761190] [2021-05-21 21:56:12,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542761190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:12,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217337658] [2021-05-21 21:56:12,895 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 [2021-05-21 21:56:12,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:56:12,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:13,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217337658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:13,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:13,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:56:13,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275767590] [2021-05-21 21:56:13,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:13,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:13,017 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) [2021-05-21 21:56:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:13,290 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-05-21 21:56:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:56:13,291 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 [2021-05-21 21:56:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:13,294 INFO L225 Difference]: With dead ends: 3221 [2021-05-21 21:56:13,294 INFO L226 Difference]: Without dead ends: 2646 [2021-05-21 21:56:13,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:56:13,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-05-21 21:56:13,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-05-21 21:56:13,315 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) [2021-05-21 21:56:13,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-05-21 21:56:13,317 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-05-21 21:56:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:13,318 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-05-21 21:56:13,318 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) [2021-05-21 21:56:13,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-05-21 21:56:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:13,319 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:13,320 INFO L521 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] [2021-05-21 21:56:13,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:56:13,529 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:13,529 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-05-21 21:56:13,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:13,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637861749] [2021-05-21 21:56:13,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:13,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:13,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637861749] [2021-05-21 21:56:13,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637861749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:13,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958834282] [2021-05-21 21:56:13,613 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 [2021-05-21 21:56:13,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:56:13,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:13,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:13,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:13,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958834282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:13,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:13,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-05-21 21:56:13,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380245094] [2021-05-21 21:56:13,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:56:13,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:13,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:56:13,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:56:13,757 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) [2021-05-21 21:56:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:13,906 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-05-21 21:56:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:56:13,906 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 [2021-05-21 21:56:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:13,908 INFO L225 Difference]: With dead ends: 3061 [2021-05-21 21:56:13,908 INFO L226 Difference]: Without dead ends: 2712 [2021-05-21 21:56:13,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:56:13,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-21 21:56:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-05-21 21:56:13,929 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) [2021-05-21 21:56:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-05-21 21:56:13,932 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-05-21 21:56:13,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:13,932 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-05-21 21:56:13,932 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) [2021-05-21 21:56:13,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-05-21 21:56:13,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:13,934 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:13,934 INFO L521 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] [2021-05-21 21:56:14,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 21:56:14,149 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-05-21 21:56:14,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:14,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210053972] [2021-05-21 21:56:14,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:14,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:14,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210053972] [2021-05-21 21:56:14,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210053972] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:14,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498663342] [2021-05-21 21:56:14,207 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 [2021-05-21 21:56:14,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:56:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:56:14,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:14,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498663342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:14,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:14,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 21:56:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022152215] [2021-05-21 21:56:14,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:56:14,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:14,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:56:14,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:56:14,334 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) [2021-05-21 21:56:14,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:14,427 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-05-21 21:56:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:56:14,427 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 [2021-05-21 21:56:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:14,429 INFO L225 Difference]: With dead ends: 2861 [2021-05-21 21:56:14,429 INFO L226 Difference]: Without dead ends: 2576 [2021-05-21 21:56:14,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:56:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-05-21 21:56:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-05-21 21:56:14,449 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) [2021-05-21 21:56:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-05-21 21:56:14,451 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-05-21 21:56:14,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:14,452 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-05-21 21:56:14,452 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) [2021-05-21 21:56:14,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-05-21 21:56:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:14,454 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:14,454 INFO L521 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] [2021-05-21 21:56:14,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:14,669 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-05-21 21:56:14,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:14,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617843820] [2021-05-21 21:56:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:14,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:14,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617843820] [2021-05-21 21:56:14,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617843820] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:14,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739402719] [2021-05-21 21:56:14,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:56:14,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:14,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739402719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:14,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:14,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 21:56:14,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718472591] [2021-05-21 21:56:14,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:14,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:14,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:14,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:14,854 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) [2021-05-21 21:56:15,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:15,037 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-05-21 21:56:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:56:15,038 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 [2021-05-21 21:56:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:15,040 INFO L225 Difference]: With dead ends: 2796 [2021-05-21 21:56:15,040 INFO L226 Difference]: Without dead ends: 2511 [2021-05-21 21:56:15,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:56:15,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-05-21 21:56:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-05-21 21:56:15,060 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) [2021-05-21 21:56:15,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-05-21 21:56:15,063 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-05-21 21:56:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:15,063 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-05-21 21:56:15,063 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) [2021-05-21 21:56:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-05-21 21:56:15,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:15,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:15,065 INFO L521 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] [2021-05-21 21:56:15,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:15,280 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:15,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-05-21 21:56:15,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:15,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309695788] [2021-05-21 21:56:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:15,335 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:15,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:15,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309695788] [2021-05-21 21:56:15,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309695788] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:15,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122924587] [2021-05-21 21:56:15,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:15,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:15,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:15,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 21:56:15,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:15,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122924587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:15,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:15,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 21:56:15,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812181883] [2021-05-21 21:56:15,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:56:15,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:56:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:56:15,450 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) [2021-05-21 21:56:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:15,580 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-05-21 21:56:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:56:15,580 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 [2021-05-21 21:56:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:15,582 INFO L225 Difference]: With dead ends: 2721 [2021-05-21 21:56:15,582 INFO L226 Difference]: Without dead ends: 2436 [2021-05-21 21:56:15,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:56:15,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-21 21:56:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-05-21 21:56:15,602 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) [2021-05-21 21:56:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-05-21 21:56:15,604 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-05-21 21:56:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:15,605 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-05-21 21:56:15,605 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) [2021-05-21 21:56:15,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-05-21 21:56:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:15,606 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:15,607 INFO L521 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] [2021-05-21 21:56:15,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:15,817 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:15,817 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-05-21 21:56:15,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:15,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628148530] [2021-05-21 21:56:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:15,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:15,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628148530] [2021-05-21 21:56:15,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628148530] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:15,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289596050] [2021-05-21 21:56:15,872 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 [2021-05-21 21:56:15,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:56:15,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:15,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:15,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:15,999 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:15,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289596050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:15,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:15,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 21:56:15,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493415175] [2021-05-21 21:56:16,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:16,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:16,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:16,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:16,000 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) [2021-05-21 21:56:16,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:16,181 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-05-21 21:56:16,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 21:56:16,181 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 [2021-05-21 21:56:16,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:16,183 INFO L225 Difference]: With dead ends: 2646 [2021-05-21 21:56:16,183 INFO L226 Difference]: Without dead ends: 2361 [2021-05-21 21:56:16,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:56:16,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-05-21 21:56:16,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-05-21 21:56:16,201 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) [2021-05-21 21:56:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-05-21 21:56:16,203 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-05-21 21:56:16,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:16,203 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-05-21 21:56:16,203 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) [2021-05-21 21:56:16,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-05-21 21:56:16,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 21:56:16,205 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:16,205 INFO L521 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] [2021-05-21 21:56:16,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-21 21:56:16,420 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:16,420 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-05-21 21:56:16,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:16,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741417702] [2021-05-21 21:56:16,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:16,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:16,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741417702] [2021-05-21 21:56:16,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741417702] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:16,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176577471] [2021-05-21 21:56:16,473 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 [2021-05-21 21:56:16,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:56:16,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:16,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:56:16,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:16,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176577471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:16,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:16,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 21:56:16,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304698069] [2021-05-21 21:56:16,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:16,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:16,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:16,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:16,616 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 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) [2021-05-21 21:56:16,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:16,876 INFO L93 Difference]: Finished difference Result 3688 states and 9970 transitions. [2021-05-21 21:56:16,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:56:16,876 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 [2021-05-21 21:56:16,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:16,879 INFO L225 Difference]: With dead ends: 3688 [2021-05-21 21:56:16,879 INFO L226 Difference]: Without dead ends: 2876 [2021-05-21 21:56:16,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 209.1ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:56:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-05-21 21:56:16,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2256. [2021-05-21 21:56:16,900 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) [2021-05-21 21:56:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6169 transitions. [2021-05-21 21:56:16,902 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6169 transitions. Word has length 65 [2021-05-21 21:56:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:16,902 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6169 transitions. [2021-05-21 21:56:16,902 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) [2021-05-21 21:56:16,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6169 transitions. [2021-05-21 21:56:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:16,905 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:16,905 INFO L521 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] [2021-05-21 21:56:17,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:17,120 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:17,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:17,120 INFO L82 PathProgramCache]: Analyzing trace with hash -710713404, now seen corresponding path program 23 times [2021-05-21 21:56:17,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:17,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837694499] [2021-05-21 21:56:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:17,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:17,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837694499] [2021-05-21 21:56:17,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837694499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:17,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752397294] [2021-05-21 21:56:17,200 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:17,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:56:17,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:17,335 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:17,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752397294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:17,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:17,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:56:17,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783145049] [2021-05-21 21:56:17,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:56:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:17,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:56:17,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:56:17,337 INFO L87 Difference]: Start difference. First operand 2256 states and 6169 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:17,497 INFO L93 Difference]: Finished difference Result 2766 states and 7317 transitions. [2021-05-21 21:56:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:56:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 21:56:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:17,499 INFO L225 Difference]: With dead ends: 2766 [2021-05-21 21:56:17,499 INFO L226 Difference]: Without dead ends: 2496 [2021-05-21 21:56:17,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:56:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-21 21:56:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2331. [2021-05-21 21:56:17,520 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) [2021-05-21 21:56:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 21:56:17,523 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 21:56:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:17,523 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 21:56:17,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 21:56:17,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:17,526 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:17,526 INFO L521 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] [2021-05-21 21:56:17,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 21:56:17,741 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:17,741 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 24 times [2021-05-21 21:56:17,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:17,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088572830] [2021-05-21 21:56:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:17,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:17,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088572830] [2021-05-21 21:56:17,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088572830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:17,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382258291] [2021-05-21 21:56:17,817 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 [2021-05-21 21:56:17,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:56:17,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:17,946 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:17,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382258291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:17,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:17,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 21:56:17,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080181658] [2021-05-21 21:56:17,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:17,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:17,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:17,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:17,948 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) [2021-05-21 21:56:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:18,119 INFO L93 Difference]: Finished difference Result 2981 states and 7747 transitions. [2021-05-21 21:56:18,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:56:18,119 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 [2021-05-21 21:56:18,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:18,121 INFO L225 Difference]: With dead ends: 2981 [2021-05-21 21:56:18,121 INFO L226 Difference]: Without dead ends: 2711 [2021-05-21 21:56:18,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:56:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-05-21 21:56:18,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2331. [2021-05-21 21:56:18,142 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) [2021-05-21 21:56:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 21:56:18,144 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 21:56:18,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:18,145 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 21:56:18,145 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) [2021-05-21 21:56:18,145 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 21:56:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:18,147 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:18,147 INFO L521 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] [2021-05-21 21:56:18,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 21:56:18,357 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:18,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:18,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 25 times [2021-05-21 21:56:18,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:18,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103462155] [2021-05-21 21:56:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:18,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:18,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103462155] [2021-05-21 21:56:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103462155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:18,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141376534] [2021-05-21 21:56:18,448 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 [2021-05-21 21:56:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:18,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:18,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141376534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:18,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:18,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:56:18,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917256734] [2021-05-21 21:56:18,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:56:18,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:18,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:56:18,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:56:18,593 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) [2021-05-21 21:56:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:18,825 INFO L93 Difference]: Finished difference Result 3116 states and 8017 transitions. [2021-05-21 21:56:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:56:18,825 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 [2021-05-21 21:56:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:18,828 INFO L225 Difference]: With dead ends: 3116 [2021-05-21 21:56:18,828 INFO L226 Difference]: Without dead ends: 2846 [2021-05-21 21:56:18,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:56:18,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-05-21 21:56:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2331. [2021-05-21 21:56:18,848 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) [2021-05-21 21:56:18,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 21:56:18,851 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 21:56:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:18,851 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 21:56:18,851 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) [2021-05-21 21:56:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 21:56:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:18,853 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:18,854 INFO L521 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] [2021-05-21 21:56:19,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:56:19,057 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 26 times [2021-05-21 21:56:19,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:19,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301742264] [2021-05-21 21:56:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:19,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:19,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:19,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301742264] [2021-05-21 21:56:19,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301742264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:19,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601357368] [2021-05-21 21:56:19,145 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 [2021-05-21 21:56:19,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:19,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:19,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:19,269 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:19,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601357368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:19,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:19,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 21:56:19,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886336016] [2021-05-21 21:56:19,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:19,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:19,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:19,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:19,270 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) [2021-05-21 21:56:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:19,452 INFO L93 Difference]: Finished difference Result 3046 states and 7877 transitions. [2021-05-21 21:56:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:56:19,452 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 [2021-05-21 21:56:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:19,454 INFO L225 Difference]: With dead ends: 3046 [2021-05-21 21:56:19,454 INFO L226 Difference]: Without dead ends: 2776 [2021-05-21 21:56:19,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 168.2ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:56:19,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-05-21 21:56:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2331. [2021-05-21 21:56:19,491 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) [2021-05-21 21:56:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 21:56:19,493 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 21:56:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:19,493 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 21:56:19,494 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) [2021-05-21 21:56:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 21:56:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:19,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:19,497 INFO L521 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] [2021-05-21 21:56:19,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:19,706 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:19,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:19,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 27 times [2021-05-21 21:56:19,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:19,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096715705] [2021-05-21 21:56:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:19,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:19,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096715705] [2021-05-21 21:56:19,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096715705] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:19,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940285450] [2021-05-21 21:56:19,787 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 [2021-05-21 21:56:19,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:56:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:19,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:56:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:19,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940285450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:19,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:19,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:56:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209464447] [2021-05-21 21:56:19,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:56:19,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:19,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:56:19,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:56:19,935 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) [2021-05-21 21:56:20,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:20,173 INFO L93 Difference]: Finished difference Result 2971 states and 7727 transitions. [2021-05-21 21:56:20,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:56:20,173 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 [2021-05-21 21:56:20,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:20,175 INFO L225 Difference]: With dead ends: 2971 [2021-05-21 21:56:20,175 INFO L226 Difference]: Without dead ends: 2701 [2021-05-21 21:56:20,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:56:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-05-21 21:56:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2331. [2021-05-21 21:56:20,194 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) [2021-05-21 21:56:20,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 21:56:20,197 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 21:56:20,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:20,197 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 21:56:20,197 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) [2021-05-21 21:56:20,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 21:56:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:20,199 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:20,199 INFO L521 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] [2021-05-21 21:56:20,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:56:20,413 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:20,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:20,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 28 times [2021-05-21 21:56:20,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:20,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755172510] [2021-05-21 21:56:20,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:20,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755172510] [2021-05-21 21:56:20,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755172510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:20,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040217579] [2021-05-21 21:56:20,477 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 [2021-05-21 21:56:20,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:56:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:20,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:20,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:20,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040217579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:20,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:20,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 21:56:20,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615304646] [2021-05-21 21:56:20,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:20,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:20,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:20,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:20,598 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) [2021-05-21 21:56:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:20,817 INFO L93 Difference]: Finished difference Result 2896 states and 7577 transitions. [2021-05-21 21:56:20,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:56:20,817 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 [2021-05-21 21:56:20,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:20,819 INFO L225 Difference]: With dead ends: 2896 [2021-05-21 21:56:20,819 INFO L226 Difference]: Without dead ends: 2626 [2021-05-21 21:56:20,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 21:56:20,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-21 21:56:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2331. [2021-05-21 21:56:20,838 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) [2021-05-21 21:56:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 21:56:20,841 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 21:56:20,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:20,841 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 21:56:20,841 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) [2021-05-21 21:56:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 21:56:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:20,843 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:20,843 INFO L521 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] [2021-05-21 21:56:21,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 21:56:21,057 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:21,057 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 29 times [2021-05-21 21:56:21,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:21,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995417073] [2021-05-21 21:56:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:21,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:21,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995417073] [2021-05-21 21:56:21,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995417073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:21,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724220132] [2021-05-21 21:56:21,151 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 [2021-05-21 21:56:21,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:56:21,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:21,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:21,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:21,315 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:21,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724220132] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:21,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:21,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:56:21,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556612782] [2021-05-21 21:56:21,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:56:21,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:21,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:56:21,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:56:21,316 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) [2021-05-21 21:56:21,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:21,654 INFO L93 Difference]: Finished difference Result 3474 states and 9203 transitions. [2021-05-21 21:56:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:56:21,654 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 [2021-05-21 21:56:21,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:21,656 INFO L225 Difference]: With dead ends: 3474 [2021-05-21 21:56:21,657 INFO L226 Difference]: Without dead ends: 2851 [2021-05-21 21:56:21,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 298.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:56:21,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-05-21 21:56:21,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2361. [2021-05-21 21:56:21,676 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) [2021-05-21 21:56:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 6444 transitions. [2021-05-21 21:56:21,678 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 6444 transitions. Word has length 75 [2021-05-21 21:56:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:21,679 INFO L482 AbstractCegarLoop]: Abstraction has 2361 states and 6444 transitions. [2021-05-21 21:56:21,679 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) [2021-05-21 21:56:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 6444 transitions. [2021-05-21 21:56:21,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:21,681 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:21,681 INFO L521 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] [2021-05-21 21:56:21,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:21,896 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:21,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:21,897 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 30 times [2021-05-21 21:56:21,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:21,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113421169] [2021-05-21 21:56:21,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:21,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:21,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113421169] [2021-05-21 21:56:21,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113421169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:21,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213706232] [2021-05-21 21:56:21,961 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 [2021-05-21 21:56:22,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:56:22,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:22,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:56:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:22,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213706232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:22,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:22,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 21:56:22,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649912722] [2021-05-21 21:56:22,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:22,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:22,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:22,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:22,098 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) [2021-05-21 21:56:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:22,329 INFO L93 Difference]: Finished difference Result 3678 states and 9871 transitions. [2021-05-21 21:56:22,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:56:22,329 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 [2021-05-21 21:56:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:22,332 INFO L225 Difference]: With dead ends: 3678 [2021-05-21 21:56:22,332 INFO L226 Difference]: Without dead ends: 3408 [2021-05-21 21:56:22,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:56:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-05-21 21:56:22,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2541. [2021-05-21 21:56:22,357 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) [2021-05-21 21:56:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7003 transitions. [2021-05-21 21:56:22,360 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7003 transitions. Word has length 75 [2021-05-21 21:56:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:22,360 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7003 transitions. [2021-05-21 21:56:22,360 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) [2021-05-21 21:56:22,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7003 transitions. [2021-05-21 21:56:22,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:22,362 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:22,362 INFO L521 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] [2021-05-21 21:56:22,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-21 21:56:22,578 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:22,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:22,579 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 31 times [2021-05-21 21:56:22,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:22,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888027683] [2021-05-21 21:56:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:22,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:22,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888027683] [2021-05-21 21:56:22,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888027683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:22,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360543180] [2021-05-21 21:56:22,647 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 [2021-05-21 21:56:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:22,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:22,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:22,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360543180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:22,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:22,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 21:56:22,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110615639] [2021-05-21 21:56:22,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:56:22,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:22,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:56:22,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:56:22,778 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) [2021-05-21 21:56:23,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:23,111 INFO L93 Difference]: Finished difference Result 3125 states and 8491 transitions. [2021-05-21 21:56:23,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 21:56:23,111 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 [2021-05-21 21:56:23,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:23,114 INFO L225 Difference]: With dead ends: 3125 [2021-05-21 21:56:23,114 INFO L226 Difference]: Without dead ends: 2636 [2021-05-21 21:56:23,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 295.6ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:56:23,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-05-21 21:56:23,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2486. [2021-05-21 21:56:23,133 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) [2021-05-21 21:56:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-05-21 21:56:23,136 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-05-21 21:56:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:23,136 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-05-21 21:56:23,136 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) [2021-05-21 21:56:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-05-21 21:56:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:23,138 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:23,138 INFO L521 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] [2021-05-21 21:56:23,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:23,339 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash 685387182, now seen corresponding path program 32 times [2021-05-21 21:56:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:23,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506851131] [2021-05-21 21:56:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:23,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506851131] [2021-05-21 21:56:23,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506851131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:23,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033082344] [2021-05-21 21:56:23,416 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 [2021-05-21 21:56:23,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:23,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:23,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 21:56:23,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:23,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033082344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:23,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:23,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 21:56:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623638714] [2021-05-21 21:56:23,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:56:23,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:56:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:56:23,556 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) [2021-05-21 21:56:23,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:23,733 INFO L93 Difference]: Finished difference Result 3591 states and 9369 transitions. [2021-05-21 21:56:23,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:56:23,733 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 [2021-05-21 21:56:23,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:23,736 INFO L225 Difference]: With dead ends: 3591 [2021-05-21 21:56:23,736 INFO L226 Difference]: Without dead ends: 3242 [2021-05-21 21:56:23,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:56:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-05-21 21:56:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2488. [2021-05-21 21:56:23,758 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) [2021-05-21 21:56:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6843 transitions. [2021-05-21 21:56:23,761 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6843 transitions. Word has length 75 [2021-05-21 21:56:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:23,761 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6843 transitions. [2021-05-21 21:56:23,761 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) [2021-05-21 21:56:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6843 transitions. [2021-05-21 21:56:23,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:23,763 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:23,764 INFO L521 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] [2021-05-21 21:56:23,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-21 21:56:23,979 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:23,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:23,980 INFO L82 PathProgramCache]: Analyzing trace with hash -137824918, now seen corresponding path program 33 times [2021-05-21 21:56:23,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:23,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318563019] [2021-05-21 21:56:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:24,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:24,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318563019] [2021-05-21 21:56:24,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318563019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:24,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480231374] [2021-05-21 21:56:24,054 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 [2021-05-21 21:56:24,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:56:24,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:24,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:24,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:24,178 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:24,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480231374] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:24,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:24,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-21 21:56:24,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009511593] [2021-05-21 21:56:24,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:24,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:24,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:24,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:24,179 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) [2021-05-21 21:56:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:24,296 INFO L93 Difference]: Finished difference Result 3441 states and 8877 transitions. [2021-05-21 21:56:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:56:24,297 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 [2021-05-21 21:56:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:24,299 INFO L225 Difference]: With dead ends: 3441 [2021-05-21 21:56:24,299 INFO L226 Difference]: Without dead ends: 3156 [2021-05-21 21:56:24,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:56:24,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-05-21 21:56:24,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2468. [2021-05-21 21:56:24,320 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) [2021-05-21 21:56:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 6803 transitions. [2021-05-21 21:56:24,322 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 6803 transitions. Word has length 75 [2021-05-21 21:56:24,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:24,323 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 6803 transitions. [2021-05-21 21:56:24,323 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) [2021-05-21 21:56:24,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 6803 transitions. [2021-05-21 21:56:24,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:24,325 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:24,325 INFO L521 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] [2021-05-21 21:56:24,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 21:56:24,525 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash -510245734, now seen corresponding path program 34 times [2021-05-21 21:56:24,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:24,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639760932] [2021-05-21 21:56:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:24,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:24,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639760932] [2021-05-21 21:56:24,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639760932] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:24,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423241141] [2021-05-21 21:56:24,610 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 [2021-05-21 21:56:24,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:56:24,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:24,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423241141] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:24,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:24,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 21:56:24,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145392160] [2021-05-21 21:56:24,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:24,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:24,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:24,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:24,748 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) [2021-05-21 21:56:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:24,925 INFO L93 Difference]: Finished difference Result 3376 states and 8747 transitions. [2021-05-21 21:56:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 21:56:24,926 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 [2021-05-21 21:56:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:24,928 INFO L225 Difference]: With dead ends: 3376 [2021-05-21 21:56:24,928 INFO L226 Difference]: Without dead ends: 3091 [2021-05-21 21:56:24,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:56:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-05-21 21:56:24,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2443. [2021-05-21 21:56:24,949 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) [2021-05-21 21:56:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 6753 transitions. [2021-05-21 21:56:24,952 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 6753 transitions. Word has length 75 [2021-05-21 21:56:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:24,952 INFO L482 AbstractCegarLoop]: Abstraction has 2443 states and 6753 transitions. [2021-05-21 21:56:24,952 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) [2021-05-21 21:56:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 6753 transitions. [2021-05-21 21:56:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:24,954 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:24,954 INFO L521 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] [2021-05-21 21:56:25,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 21:56:25,170 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash -328434196, now seen corresponding path program 35 times [2021-05-21 21:56:25,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:25,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525190293] [2021-05-21 21:56:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:25,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525190293] [2021-05-21 21:56:25,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525190293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:25,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579925089] [2021-05-21 21:56:25,241 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 [2021-05-21 21:56:25,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:56:25,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:25,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579925089] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:25,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:25,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-21 21:56:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135489289] [2021-05-21 21:56:25,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:25,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:25,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:25,365 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) [2021-05-21 21:56:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:25,532 INFO L93 Difference]: Finished difference Result 3301 states and 8597 transitions. [2021-05-21 21:56:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:56:25,532 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 [2021-05-21 21:56:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:25,534 INFO L225 Difference]: With dead ends: 3301 [2021-05-21 21:56:25,534 INFO L226 Difference]: Without dead ends: 3016 [2021-05-21 21:56:25,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:56:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-05-21 21:56:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2418. [2021-05-21 21:56:25,555 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) [2021-05-21 21:56:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6703 transitions. [2021-05-21 21:56:25,557 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6703 transitions. Word has length 75 [2021-05-21 21:56:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:25,558 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6703 transitions. [2021-05-21 21:56:25,558 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) [2021-05-21 21:56:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6703 transitions. [2021-05-21 21:56:25,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:25,559 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:25,559 INFO L521 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] [2021-05-21 21:56:25,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 21:56:25,773 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash -24508132, now seen corresponding path program 36 times [2021-05-21 21:56:25,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:25,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978885418] [2021-05-21 21:56:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:25,844 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:25,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:25,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978885418] [2021-05-21 21:56:25,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978885418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:25,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735084222] [2021-05-21 21:56:25,844 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 [2021-05-21 21:56:25,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:56:25,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:25,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:25,981 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:25,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735084222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:25,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:25,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 21:56:25,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249550274] [2021-05-21 21:56:25,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:25,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:25,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:25,982 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) [2021-05-21 21:56:26,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:26,192 INFO L93 Difference]: Finished difference Result 3226 states and 8447 transitions. [2021-05-21 21:56:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 21:56:26,192 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 [2021-05-21 21:56:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:26,195 INFO L225 Difference]: With dead ends: 3226 [2021-05-21 21:56:26,195 INFO L226 Difference]: Without dead ends: 2941 [2021-05-21 21:56:26,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-05-21 21:56:26,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-05-21 21:56:26,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2393. [2021-05-21 21:56:26,222 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) [2021-05-21 21:56:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 6653 transitions. [2021-05-21 21:56:26,225 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 6653 transitions. Word has length 75 [2021-05-21 21:56:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:26,225 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 6653 transitions. [2021-05-21 21:56:26,225 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) [2021-05-21 21:56:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 6653 transitions. [2021-05-21 21:56:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:26,227 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:26,227 INFO L521 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] [2021-05-21 21:56:26,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:26,427 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:26,428 INFO L82 PathProgramCache]: Analyzing trace with hash -670670610, now seen corresponding path program 37 times [2021-05-21 21:56:26,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:26,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093787475] [2021-05-21 21:56:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:26,492 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:26,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093787475] [2021-05-21 21:56:26,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093787475] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:26,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417650180] [2021-05-21 21:56:26,493 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 [2021-05-21 21:56:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:26,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:26,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:26,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417650180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:26,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:26,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-21 21:56:26,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830445255] [2021-05-21 21:56:26,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:56:26,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:56:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:56:26,608 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) [2021-05-21 21:56:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:26,784 INFO L93 Difference]: Finished difference Result 3151 states and 8297 transitions. [2021-05-21 21:56:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 21:56:26,784 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 [2021-05-21 21:56:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:26,786 INFO L225 Difference]: With dead ends: 3151 [2021-05-21 21:56:26,786 INFO L226 Difference]: Without dead ends: 2866 [2021-05-21 21:56:26,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-05-21 21:56:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-05-21 21:56:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2368. [2021-05-21 21:56:26,804 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) [2021-05-21 21:56:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6603 transitions. [2021-05-21 21:56:26,807 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6603 transitions. Word has length 75 [2021-05-21 21:56:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:26,807 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6603 transitions. [2021-05-21 21:56:26,807 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) [2021-05-21 21:56:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6603 transitions. [2021-05-21 21:56:26,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:26,809 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:26,809 INFO L521 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] [2021-05-21 21:56:27,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-21 21:56:27,017 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1917790238, now seen corresponding path program 38 times [2021-05-21 21:56:27,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:27,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805155824] [2021-05-21 21:56:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:27,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:27,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805155824] [2021-05-21 21:56:27,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805155824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:27,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187026813] [2021-05-21 21:56:27,079 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 [2021-05-21 21:56:27,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:56:27,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:27,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 21:56:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:56:27,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187026813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:27,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:27,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 21:56:27,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716738467] [2021-05-21 21:56:27,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:56:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:56:27,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:56:27,209 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) [2021-05-21 21:56:27,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:27,456 INFO L93 Difference]: Finished difference Result 3076 states and 8147 transitions. [2021-05-21 21:56:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:56:27,456 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 [2021-05-21 21:56:27,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:27,458 INFO L225 Difference]: With dead ends: 3076 [2021-05-21 21:56:27,458 INFO L226 Difference]: Without dead ends: 2791 [2021-05-21 21:56:27,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 214.3ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:56:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-05-21 21:56:27,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2343. [2021-05-21 21:56:27,477 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) [2021-05-21 21:56:27,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 6553 transitions. [2021-05-21 21:56:27,479 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 6553 transitions. Word has length 75 [2021-05-21 21:56:27,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:27,480 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 6553 transitions. [2021-05-21 21:56:27,480 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) [2021-05-21 21:56:27,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 6553 transitions. [2021-05-21 21:56:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 21:56:27,481 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:27,481 INFO L521 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] [2021-05-21 21:56:27,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 21:56:27,682 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2118606207, now seen corresponding path program 39 times [2021-05-21 21:56:27,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:27,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043382004] [2021-05-21 21:56:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:56:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:27,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:56:27,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043382004] [2021-05-21 21:56:27,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043382004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:27,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484698370] [2021-05-21 21:56:27,744 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 [2021-05-21 21:56:27,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:56:27,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:56:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:56:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:56:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:56:27,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484698370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:56:27,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:56:27,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 21:56:27,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613656989] [2021-05-21 21:56:27,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:56:27,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:56:27,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:56:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:56:27,876 INFO L87 Difference]: Start difference. First operand 2343 states and 6553 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:56:28,203 INFO L93 Difference]: Finished difference Result 3365 states and 9139 transitions. [2021-05-21 21:56:28,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:56:28,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have 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 [2021-05-21 21:56:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:56:28,206 INFO L225 Difference]: With dead ends: 3365 [2021-05-21 21:56:28,206 INFO L226 Difference]: Without dead ends: 2756 [2021-05-21 21:56:28,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 274.0ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:56:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-05-21 21:56:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1634. [2021-05-21 21:56:28,222 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) [2021-05-21 21:56:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4466 transitions. [2021-05-21 21:56:28,223 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4466 transitions. Word has length 75 [2021-05-21 21:56:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:56:28,224 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 4466 transitions. [2021-05-21 21:56:28,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:56:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4466 transitions. [2021-05-21 21:56:28,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 21:56:28,225 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:56:28,225 INFO L521 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] [2021-05-21 21:56:28,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:56:28,425 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 21:56:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:56:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-05-21 21:56:28,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:56:28,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575741789] [2021-05-21 21:56:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:56:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 21:56:28,431 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 21:56:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 21:56:28,436 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 21:56:28,459 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 21:56:28,459 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 21:56:28,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-21 21:56:28,460 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2021-05-21 21:56:28,461 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-05-21 21:56:28,462 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:56:28,462 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:56:28,462 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:56:28,462 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:56:28,462 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:56:28,462 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:56:28,462 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:56:28,462 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-05-21 21:56:28,463 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-05-21 21:56:28,482 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) [2021-05-21 21:56:28,483 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) [2021-05-21 21:56:28,486 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-21 21:56:28,486 INFO L315 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2021-05-21 21:56:28,486 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 21:56:28,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 09:56:28 BasicIcfg [2021-05-21 21:56:28,549 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 21:56:28,549 INFO L168 Benchmark]: Toolchain (without parser) took 29811.30 ms. Allocated memory was 367.0 MB in the beginning and 778.0 MB in the end (delta: 411.0 MB). Free memory was 329.4 MB in the beginning and 613.6 MB in the end (delta: -284.1 MB). Peak memory consumption was 127.0 MB. Max. memory is 16.0 GB. [2021-05-21 21:56:28,549 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 347.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:56:28,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 373.20 ms. Allocated memory is still 367.0 MB. Free memory was 329.2 MB in the beginning and 329.6 MB in the end (delta: -442.4 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:56:28,549 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.87 ms. Allocated memory is still 367.0 MB. Free memory was 329.6 MB in the beginning and 327.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:56:28,550 INFO L168 Benchmark]: Boogie Preprocessor took 27.16 ms. Allocated memory is still 367.0 MB. Free memory was 327.6 MB in the beginning and 326.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:56:28,550 INFO L168 Benchmark]: RCFGBuilder took 287.15 ms. Allocated memory is still 367.0 MB. Free memory was 326.6 MB in the beginning and 304.5 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:56:28,550 INFO L168 Benchmark]: TraceAbstraction took 29079.01 ms. Allocated memory was 367.0 MB in the beginning and 778.0 MB in the end (delta: 411.0 MB). Free memory was 303.5 MB in the beginning and 613.6 MB in the end (delta: -310.1 MB). Peak memory consumption was 103.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:56:28,550 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 367.0 MB. Free memory is still 347.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 373.20 ms. Allocated memory is still 367.0 MB. Free memory was 329.2 MB in the beginning and 329.6 MB in the end (delta: -442.4 kB). Peak memory consumption was 7.1 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 39.87 ms. Allocated memory is still 367.0 MB. Free memory was 329.6 MB in the beginning and 327.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.16 ms. Allocated memory is still 367.0 MB. Free memory was 327.6 MB in the beginning and 326.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 287.15 ms. Allocated memory is still 367.0 MB. Free memory was 326.6 MB in the beginning and 304.5 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 29079.01 ms. Allocated memory was 367.0 MB in the beginning and 778.0 MB in the end (delta: 411.0 MB). Free memory was 303.5 MB in the beginning and 613.6 MB in the end (delta: -310.1 MB). Peak memory consumption was 103.1 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] [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] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; 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 < 5 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*5 +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=0, k=1] [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=0, k=1, k++=0] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, 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] [L704] COND TRUE 2 k < 5 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=1, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2, k++=1] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1, 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] [L704] COND TRUE 2 k < 5 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=2, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2, k++=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L704] COND TRUE 2 k < 5 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=3, k=4] [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=3, k=4, k++=3] [L696] COND TRUE 1 k < 5 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3, 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] [L704] COND TRUE 2 k < 5 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] [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=4] [L719] 0 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 28924.6ms, OverallIterations: 50, TraceHistogramMax: 5, EmptinessCheckTime: 103.6ms, AutomataDifference: 8965.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 80.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4858 SDtfs, 17057 SDslu, 31174 SDs, 0 SdLazy, 5492 SolverSat, 1780 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2242.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3933 GetRequests, 2793 SyntacticMatches, 0 SemanticMatches, 1140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5848 ImplicationChecksByTransitivity, 7492.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2541occurred in iteration=40, InterpolantAutomatonStates: 963, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1230.9ms AutomataMinimizationTime, 49 MinimizatonAttempts, 23094 StatesRemovedByMinimization, 49 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 368.2ms SsaConstructionTime, 945.6ms SatisfiabilityAnalysisTime, 6566.2ms InterpolantComputationTime, 5898 NumberOfCodeBlocks, 5892 NumberOfCodeBlocksAsserted, 169 NumberOfCheckSat, 5726 ConstructedInterpolants, 0 QuantifiedInterpolants, 22390 SizeOfPredicates, 332 NumberOfNonLiveVariables, 6528 ConjunctsInSsa, 564 ConjunctsInUnsatCore, 92 InterpolantComputations, 6 PerfectInterpolantSequences, 34/3000 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 24.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 3.4ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1680occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...