/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-12 16:02:20,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-12 16:02:20,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-12 16:02:20,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-12 16:02:20,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-12 16:02:20,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-12 16:02:20,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-12 16:02:20,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-12 16:02:20,250 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-12 16:02:20,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-12 16:02:20,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-12 16:02:20,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-12 16:02:20,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-12 16:02:20,258 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-12 16:02:20,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-12 16:02:20,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-12 16:02:20,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-12 16:02:20,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-12 16:02:20,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-12 16:02:20,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-12 16:02:20,276 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-12 16:02:20,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-12 16:02:20,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-12 16:02:20,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-12 16:02:20,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-12 16:02:20,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-12 16:02:20,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-12 16:02:20,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-12 16:02:20,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-12 16:02:20,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2021-08-12 16:02:20,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-12 16:02:20,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-12 16:02:20,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-12 16:02:20,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-12 16:02:20,329 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-12 16:02:20,330 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-12 16:02:20,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-12 16:02:20,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-12 16:02:20,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-12 16:02:20,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-12 16:02:20,333 INFO L138 SettingsManager]: * Use SBE=true [2021-08-12 16:02:20,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-12 16:02:20,333 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-12 16:02:20,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-12 16:02:20,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-12 16:02:20,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-12 16:02:20,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-12 16:02:20,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-12 16:02:20,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-12 16:02:20,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-12 16:02:20,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-12 16:02:20,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-12 16:02:20,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-12 16:02:20,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-12 16:02:20,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-12 16:02:20,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-12 16:02:20,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-12 16:02:20,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-12 16:02:20,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-12 16:02:20,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-12 16:02:20,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-12 16:02:20,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-12 16:02:20,337 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-12 16:02:20,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-12 16:02:20,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-12 16:02:20,641 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-12 16:02:20,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-12 16:02:20,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-12 16:02:20,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-12 16:02:20,661 INFO L275 PluginConnector]: CDTParser initialized [2021-08-12 16:02:20,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-08-12 16:02:20,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d423f16b3/9354e40a01344e58b5375585f5bd94f4/FLAG94770eefe [2021-08-12 16:02:21,346 INFO L306 CDTParser]: Found 1 translation units. [2021-08-12 16:02:21,346 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2021-08-12 16:02:21,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d423f16b3/9354e40a01344e58b5375585f5bd94f4/FLAG94770eefe [2021-08-12 16:02:21,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d423f16b3/9354e40a01344e58b5375585f5bd94f4 [2021-08-12 16:02:21,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-12 16:02:21,745 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-12 16:02:21,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-12 16:02:21,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-12 16:02:21,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-12 16:02:21,760 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 04:02:21" (1/1) ... [2021-08-12 16:02:21,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16239f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:21, skipping insertion in model container [2021-08-12 16:02:21,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.08 04:02:21" (1/1) ... [2021-08-12 16:02:21,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-12 16:02:21,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-12 16:02:22,108 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-08-12 16:02:22,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 16:02:22,117 INFO L203 MainTranslator]: Completed pre-run [2021-08-12 16:02:22,164 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2021-08-12 16:02:22,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-12 16:02:22,231 INFO L208 MainTranslator]: Completed translation [2021-08-12 16:02:22,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22 WrapperNode [2021-08-12 16:02:22,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-12 16:02:22,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-12 16:02:22,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-12 16:02:22,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-12 16:02:22,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-12 16:02:22,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-12 16:02:22,288 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-12 16:02:22,288 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-12 16:02:22,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,317 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (1/1) ... [2021-08-12 16:02:22,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-12 16:02:22,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-12 16:02:22,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-12 16:02:22,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-12 16:02:22,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (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 [2021-08-12 16:02:22,391 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-08-12 16:02:22,392 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-08-12 16:02:22,392 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-08-12 16:02:22,392 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-08-12 16:02:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-12 16:02:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-08-12 16:02:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-12 16:02:22,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-12 16:02:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-12 16:02:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-08-12 16:02:22,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-12 16:02:22,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-12 16:02:22,395 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-12 16:02:22,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-12 16:02:22,684 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-12 16:02:22,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 04:02:22 BoogieIcfgContainer [2021-08-12 16:02:22,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-12 16:02:22,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-12 16:02:22,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-12 16:02:22,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-12 16:02:22,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.08 04:02:21" (1/3) ... [2021-08-12 16:02:22,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7ef6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 04:02:22, skipping insertion in model container [2021-08-12 16:02:22,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.08 04:02:22" (2/3) ... [2021-08-12 16:02:22,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c7ef6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.08 04:02:22, skipping insertion in model container [2021-08-12 16:02:22,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.08 04:02:22" (3/3) ... [2021-08-12 16:02:22,691 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-08-12 16:02:22,696 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-12 16:02:22,696 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-12 16:02:22,697 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-12 16:02:22,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,719 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,719 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,720 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,720 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,721 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,721 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,721 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,722 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,722 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,722 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,723 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,723 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,724 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,725 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,725 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,725 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,726 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,726 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,727 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,727 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,729 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,729 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,729 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,729 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,733 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,734 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,734 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,734 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,734 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,734 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-12 16:02:22,736 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-12 16:02:22,753 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-12 16:02:22,769 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-12 16:02:22,769 INFO L379 AbstractCegarLoop]: Hoare is true [2021-08-12 16:02:22,769 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-12 16:02:22,769 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-12 16:02:22,769 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-12 16:02:22,769 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-12 16:02:22,769 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-12 16:02:22,770 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-12 16:02:22,777 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-08-12 16:02:22,888 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) [2021-08-12 16:02:22,905 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) [2021-08-12 16:02:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-12 16:02:22,917 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:22,918 INFO L550 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] [2021-08-12 16:02:22,918 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:22,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-08-12 16:02:22,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:22,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670299390] [2021-08-12 16:02:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:23,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:23,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:23,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670299390] [2021-08-12 16:02:23,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670299390] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:23,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:23,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:23,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889679304] [2021-08-12 16:02:23,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:23,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:23,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:23,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:23,226 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) [2021-08-12 16:02:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:23,551 INFO L93 Difference]: Finished difference Result 4667 states and 14923 transitions. [2021-08-12 16:02:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-12 16:02:23,552 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 [2021-08-12 16:02:23,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:23,574 INFO L225 Difference]: With dead ends: 4667 [2021-08-12 16:02:23,574 INFO L226 Difference]: Without dead ends: 1248 [2021-08-12 16:02:23,582 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:23,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2021-08-12 16:02:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 800. [2021-08-12 16:02:23,658 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) [2021-08-12 16:02:23,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-08-12 16:02:23,667 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 32 [2021-08-12 16:02:23,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:23,667 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-08-12 16:02:23,668 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) [2021-08-12 16:02:23,668 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-08-12 16:02:23,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-12 16:02:23,671 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:23,671 INFO L550 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] [2021-08-12 16:02:23,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-12 16:02:23,671 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:23,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:23,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-08-12 16:02:23,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:23,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953262788] [2021-08-12 16:02:23,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:23,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:23,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953262788] [2021-08-12 16:02:23,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953262788] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:23,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:23,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-12 16:02:23,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393069075] [2021-08-12 16:02:23,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-12 16:02:23,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:23,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-12 16:02:23,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-12 16:02:23,833 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) [2021-08-12 16:02:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:24,003 INFO L93 Difference]: Finished difference Result 1462 states and 4020 transitions. [2021-08-12 16:02:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-12 16:02:24,004 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 [2021-08-12 16:02:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:24,013 INFO L225 Difference]: With dead ends: 1462 [2021-08-12 16:02:24,013 INFO L226 Difference]: Without dead ends: 920 [2021-08-12 16:02:24,014 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-12 16:02:24,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-08-12 16:02:24,042 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) [2021-08-12 16:02:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-08-12 16:02:24,047 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-08-12 16:02:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:24,048 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-08-12 16:02:24,048 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) [2021-08-12 16:02:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-08-12 16:02:24,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:24,053 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:24,053 INFO L550 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] [2021-08-12 16:02:24,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-12 16:02:24,053 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:24,054 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-08-12 16:02:24,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:24,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291533597] [2021-08-12 16:02:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:24,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:24,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291533597] [2021-08-12 16:02:24,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291533597] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:24,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:24,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:24,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520699498] [2021-08-12 16:02:24,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:24,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:24,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:24,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:24,150 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) [2021-08-12 16:02:24,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:24,386 INFO L93 Difference]: Finished difference Result 1432 states and 3904 transitions. [2021-08-12 16:02:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 16:02:24,387 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 [2021-08-12 16:02:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:24,394 INFO L225 Difference]: With dead ends: 1432 [2021-08-12 16:02:24,394 INFO L226 Difference]: Without dead ends: 1044 [2021-08-12 16:02:24,395 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-08-12 16:02:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-08-12 16:02:24,417 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) [2021-08-12 16:02:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-08-12 16:02:24,422 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-08-12 16:02:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:24,423 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-08-12 16:02:24,423 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) [2021-08-12 16:02:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-08-12 16:02:24,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:24,426 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:24,426 INFO L550 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] [2021-08-12 16:02:24,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-12 16:02:24,426 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:24,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:24,428 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-08-12 16:02:24,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:24,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117984013] [2021-08-12 16:02:24,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:24,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:24,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:24,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117984013] [2021-08-12 16:02:24,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117984013] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:24,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:24,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-12 16:02:24,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300624407] [2021-08-12 16:02:24,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-12 16:02:24,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:24,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-12 16:02:24,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-12 16:02:24,581 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) [2021-08-12 16:02:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:24,738 INFO L93 Difference]: Finished difference Result 1900 states and 5256 transitions. [2021-08-12 16:02:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:24,739 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 [2021-08-12 16:02:24,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:24,753 INFO L225 Difference]: With dead ends: 1900 [2021-08-12 16:02:24,753 INFO L226 Difference]: Without dead ends: 1505 [2021-08-12 16:02:24,754 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:24,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-08-12 16:02:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-08-12 16:02:24,790 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) [2021-08-12 16:02:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-08-12 16:02:24,797 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-08-12 16:02:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:24,799 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-08-12 16:02:24,799 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) [2021-08-12 16:02:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-08-12 16:02:24,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:24,800 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:24,801 INFO L550 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] [2021-08-12 16:02:24,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-12 16:02:24,801 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:24,801 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-08-12 16:02:24,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:24,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367337341] [2021-08-12 16:02:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:24,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:24,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367337341] [2021-08-12 16:02:24,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367337341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:24,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:24,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:24,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348662481] [2021-08-12 16:02:24,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:24,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:24,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:24,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:24,897 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) [2021-08-12 16:02:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:25,076 INFO L93 Difference]: Finished difference Result 2339 states and 6390 transitions. [2021-08-12 16:02:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-12 16:02:25,077 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 [2021-08-12 16:02:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:25,089 INFO L225 Difference]: With dead ends: 2339 [2021-08-12 16:02:25,089 INFO L226 Difference]: Without dead ends: 1944 [2021-08-12 16:02:25,092 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-08-12 16:02:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-08-12 16:02:25,126 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) [2021-08-12 16:02:25,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-08-12 16:02:25,133 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-08-12 16:02:25,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:25,134 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-08-12 16:02:25,134 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) [2021-08-12 16:02:25,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-08-12 16:02:25,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-12 16:02:25,135 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:25,135 INFO L550 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] [2021-08-12 16:02:25,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-12 16:02:25,136 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:25,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:25,136 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-08-12 16:02:25,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:25,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652212468] [2021-08-12 16:02:25,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:25,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:25,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:25,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652212468] [2021-08-12 16:02:25,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652212468] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-12 16:02:25,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-12 16:02:25,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-12 16:02:25,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771576328] [2021-08-12 16:02:25,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-12 16:02:25,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:25,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-12 16:02:25,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-12 16:02:25,197 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) [2021-08-12 16:02:25,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:25,404 INFO L93 Difference]: Finished difference Result 1799 states and 5039 transitions. [2021-08-12 16:02:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-12 16:02:25,405 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 [2021-08-12 16:02:25,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:25,416 INFO L225 Difference]: With dead ends: 1799 [2021-08-12 16:02:25,417 INFO L226 Difference]: Without dead ends: 1173 [2021-08-12 16:02:25,418 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-08-12 16:02:25,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 922. [2021-08-12 16:02:25,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.732899022801303) internal successors, (2517), 921 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2517 transitions. [2021-08-12 16:02:25,448 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2517 transitions. Word has length 40 [2021-08-12 16:02:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:25,449 INFO L482 AbstractCegarLoop]: Abstraction has 922 states and 2517 transitions. [2021-08-12 16:02:25,449 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) [2021-08-12 16:02:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2517 transitions. [2021-08-12 16:02:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:25,454 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:25,454 INFO L550 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] [2021-08-12 16:02:25,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-12 16:02:25,454 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:25,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-08-12 16:02:25,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:25,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133634624] [2021-08-12 16:02:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:25,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:25,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133634624] [2021-08-12 16:02:25,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133634624] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:25,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33442650] [2021-08-12 16:02:25,574 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 [2021-08-12 16:02:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:25,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:25,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33442650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:25,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:25,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:25,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133872664] [2021-08-12 16:02:25,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:25,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:25,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:25,938 INFO L87 Difference]: Start difference. First operand 922 states and 2517 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) [2021-08-12 16:02:26,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:26,185 INFO L93 Difference]: Finished difference Result 1654 states and 4539 transitions. [2021-08-12 16:02:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-12 16:02:26,185 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 [2021-08-12 16:02:26,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:26,195 INFO L225 Difference]: With dead ends: 1654 [2021-08-12 16:02:26,195 INFO L226 Difference]: Without dead ends: 1256 [2021-08-12 16:02:26,196 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:26,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2021-08-12 16:02:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1113. [2021-08-12 16:02:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1113 states, 1112 states have (on average 2.741007194244604) internal successors, (3048), 1112 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1113 states to 1113 states and 3048 transitions. [2021-08-12 16:02:26,257 INFO L78 Accepts]: Start accepts. Automaton has 1113 states and 3048 transitions. Word has length 45 [2021-08-12 16:02:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:26,258 INFO L482 AbstractCegarLoop]: Abstraction has 1113 states and 3048 transitions. [2021-08-12 16:02:26,258 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) [2021-08-12 16:02:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1113 states and 3048 transitions. [2021-08-12 16:02:26,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:26,260 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:26,260 INFO L550 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] [2021-08-12 16:02:26,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-12 16:02:26,475 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-08-12 16:02:26,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:26,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073942234] [2021-08-12 16:02:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:26,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073942234] [2021-08-12 16:02:26,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073942234] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:26,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366728909] [2021-08-12 16:02:26,565 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 [2021-08-12 16:02:26,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:26,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:26,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:26,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366728909] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:26,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:26,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-12 16:02:26,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322965124] [2021-08-12 16:02:26,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 16:02:26,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:26,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 16:02:26,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:26,751 INFO L87 Difference]: Start difference. First operand 1113 states and 3048 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) [2021-08-12 16:02:26,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:26,980 INFO L93 Difference]: Finished difference Result 2536 states and 6943 transitions. [2021-08-12 16:02:26,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 16:02:26,981 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 [2021-08-12 16:02:26,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:26,993 INFO L225 Difference]: With dead ends: 2536 [2021-08-12 16:02:26,993 INFO L226 Difference]: Without dead ends: 2138 [2021-08-12 16:02:26,994 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:26,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-08-12 16:02:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1293. [2021-08-12 16:02:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.791795665634675) internal successors, (3607), 1292 states have internal predecessors, (3607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:27,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 3607 transitions. [2021-08-12 16:02:27,044 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 3607 transitions. Word has length 45 [2021-08-12 16:02:27,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:27,044 INFO L482 AbstractCegarLoop]: Abstraction has 1293 states and 3607 transitions. [2021-08-12 16:02:27,044 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) [2021-08-12 16:02:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 3607 transitions. [2021-08-12 16:02:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-12 16:02:27,046 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:27,046 INFO L550 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] [2021-08-12 16:02:27,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:27,269 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:27,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:27,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-08-12 16:02:27,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:27,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145204442] [2021-08-12 16:02:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:27,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:27,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145204442] [2021-08-12 16:02:27,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145204442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:27,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005950454] [2021-08-12 16:02:27,341 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 [2021-08-12 16:02:27,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-12 16:02:27,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:27,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-12 16:02:27,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:27,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005950454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:27,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:27,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-12 16:02:27,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319772910] [2021-08-12 16:02:27,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:27,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:27,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:27,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:27,541 INFO L87 Difference]: Start difference. First operand 1293 states and 3607 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) [2021-08-12 16:02:27,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:27,883 INFO L93 Difference]: Finished difference Result 2324 states and 6501 transitions. [2021-08-12 16:02:27,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:27,883 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 [2021-08-12 16:02:27,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:27,895 INFO L225 Difference]: With dead ends: 2324 [2021-08-12 16:02:27,895 INFO L226 Difference]: Without dead ends: 1621 [2021-08-12 16:02:27,896 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=132, Invalid=374, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-08-12 16:02:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1328. [2021-08-12 16:02:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1328 states, 1327 states have (on average 2.7754333082140166) internal successors, (3683), 1327 states have internal predecessors, (3683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1328 states to 1328 states and 3683 transitions. [2021-08-12 16:02:27,945 INFO L78 Accepts]: Start accepts. Automaton has 1328 states and 3683 transitions. Word has length 45 [2021-08-12 16:02:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:27,945 INFO L482 AbstractCegarLoop]: Abstraction has 1328 states and 3683 transitions. [2021-08-12 16:02:27,945 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) [2021-08-12 16:02:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1328 states and 3683 transitions. [2021-08-12 16:02:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 16:02:27,947 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:27,947 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:28,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:28,171 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:28,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:28,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1229914011, now seen corresponding path program 1 times [2021-08-12 16:02:28,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:28,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717670678] [2021-08-12 16:02:28,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:28,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:28,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:28,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717670678] [2021-08-12 16:02:28,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717670678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:28,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240734296] [2021-08-12 16:02:28,266 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 [2021-08-12 16:02:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:28,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:28,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:28,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240734296] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:28,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:28,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:28,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103908199] [2021-08-12 16:02:28,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:28,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:28,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:28,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:28,472 INFO L87 Difference]: Start difference. First operand 1328 states and 3683 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 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) [2021-08-12 16:02:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:28,762 INFO L93 Difference]: Finished difference Result 2196 states and 6059 transitions. [2021-08-12 16:02:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:28,763 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 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 50 [2021-08-12 16:02:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:28,775 INFO L225 Difference]: With dead ends: 2196 [2021-08-12 16:02:28,775 INFO L226 Difference]: Without dead ends: 1734 [2021-08-12 16:02:28,776 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:02:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2021-08-12 16:02:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1413. [2021-08-12 16:02:28,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.7287535410764874) internal successors, (3853), 1412 states have internal predecessors, (3853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:28,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3853 transitions. [2021-08-12 16:02:28,840 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3853 transitions. Word has length 50 [2021-08-12 16:02:28,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:28,841 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3853 transitions. [2021-08-12 16:02:28,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 12 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) [2021-08-12 16:02:28,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3853 transitions. [2021-08-12 16:02:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 16:02:28,845 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:28,845 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:29,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:29,061 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:29,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1568318167, now seen corresponding path program 2 times [2021-08-12 16:02:29,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:29,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317549634] [2021-08-12 16:02:29,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:29,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:29,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317549634] [2021-08-12 16:02:29,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317549634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:29,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779433376] [2021-08-12 16:02:29,136 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 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 [2021-08-12 16:02:29,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:29,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:29,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:29,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:29,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779433376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:29,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:29,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 16:02:29,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306583444] [2021-08-12 16:02:29,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 16:02:29,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:29,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 16:02:29,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:29,294 INFO L87 Difference]: Start difference. First operand 1413 states and 3853 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:29,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:29,558 INFO L93 Difference]: Finished difference Result 2189 states and 5789 transitions. [2021-08-12 16:02:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-12 16:02:29,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-12 16:02:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:29,570 INFO L225 Difference]: With dead ends: 2189 [2021-08-12 16:02:29,571 INFO L226 Difference]: Without dead ends: 1791 [2021-08-12 16:02:29,572 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:02:29,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2021-08-12 16:02:29,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 1428. [2021-08-12 16:02:29,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.721093202522775) internal successors, (3883), 1427 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3883 transitions. [2021-08-12 16:02:29,620 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3883 transitions. Word has length 50 [2021-08-12 16:02:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:29,621 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3883 transitions. [2021-08-12 16:02:29,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3883 transitions. [2021-08-12 16:02:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 16:02:29,623 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:29,623 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:29,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-12 16:02:29,839 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:29,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:29,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406841, now seen corresponding path program 3 times [2021-08-12 16:02:29,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:29,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956621049] [2021-08-12 16:02:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:29,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:29,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956621049] [2021-08-12 16:02:29,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956621049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:29,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354703243] [2021-08-12 16:02:29,913 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 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 [2021-08-12 16:02:29,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 16:02:29,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:29,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:30,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354703243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:30,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:30,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 16:02:30,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747826000] [2021-08-12 16:02:30,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:30,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:30,080 INFO L87 Difference]: Start difference. First operand 1428 states and 3883 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:30,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:30,392 INFO L93 Difference]: Finished difference Result 2134 states and 5709 transitions. [2021-08-12 16:02:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:30,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-12 16:02:30,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:30,402 INFO L225 Difference]: With dead ends: 2134 [2021-08-12 16:02:30,402 INFO L226 Difference]: Without dead ends: 1736 [2021-08-12 16:02:30,404 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:02:30,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1736 states. [2021-08-12 16:02:30,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1736 to 1428. [2021-08-12 16:02:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 2.7245970567624385) internal successors, (3888), 1427 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 3888 transitions. [2021-08-12 16:02:30,455 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 3888 transitions. Word has length 50 [2021-08-12 16:02:30,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:30,456 INFO L482 AbstractCegarLoop]: Abstraction has 1428 states and 3888 transitions. [2021-08-12 16:02:30,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:30,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 3888 transitions. [2021-08-12 16:02:30,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 16:02:30,458 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:30,458 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:30,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:30,681 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:30,682 INFO L82 PathProgramCache]: Analyzing trace with hash -21240761, now seen corresponding path program 4 times [2021-08-12 16:02:30,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:30,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672712654] [2021-08-12 16:02:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:30,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:30,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672712654] [2021-08-12 16:02:30,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672712654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:30,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670869813] [2021-08-12 16:02:30,748 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 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 [2021-08-12 16:02:30,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:30,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:30,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:30,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670869813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:30,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:30,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-12 16:02:30,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654201207] [2021-08-12 16:02:30,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-12 16:02:30,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:30,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-12 16:02:30,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-12 16:02:30,940 INFO L87 Difference]: Start difference. First operand 1428 states and 3888 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:31,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:31,224 INFO L93 Difference]: Finished difference Result 2926 states and 7933 transitions. [2021-08-12 16:02:31,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-12 16:02:31,225 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-12 16:02:31,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:31,249 INFO L225 Difference]: With dead ends: 2926 [2021-08-12 16:02:31,249 INFO L226 Difference]: Without dead ends: 2528 [2021-08-12 16:02:31,251 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 119.4ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:02:31,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2528 states. [2021-08-12 16:02:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2528 to 1608. [2021-08-12 16:02:31,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 2.7672682016179215) internal successors, (4447), 1607 states have internal predecessors, (4447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4447 transitions. [2021-08-12 16:02:31,318 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4447 transitions. Word has length 50 [2021-08-12 16:02:31,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:31,319 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 4447 transitions. [2021-08-12 16:02:31,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:31,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4447 transitions. [2021-08-12 16:02:31,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-12 16:02:31,321 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:31,321 INFO L550 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:02:31,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:31,537 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1102489, now seen corresponding path program 5 times [2021-08-12 16:02:31,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:31,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861199422] [2021-08-12 16:02:31,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:31,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:31,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861199422] [2021-08-12 16:02:31,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861199422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:31,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838687162] [2021-08-12 16:02:31,610 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 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 [2021-08-12 16:02:31,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-12 16:02:31,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:31,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-12 16:02:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:31,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838687162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:31,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:31,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-12 16:02:31,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991969285] [2021-08-12 16:02:31,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-08-12 16:02:31,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:31,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-12 16:02:31,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-12 16:02:31,803 INFO L87 Difference]: Start difference. First operand 1608 states and 4447 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:32,169 INFO L93 Difference]: Finished difference Result 2413 states and 6633 transitions. [2021-08-12 16:02:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:02:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-12 16:02:32,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:32,177 INFO L225 Difference]: With dead ends: 2413 [2021-08-12 16:02:32,177 INFO L226 Difference]: Without dead ends: 1706 [2021-08-12 16:02:32,179 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:02:32,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2021-08-12 16:02:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1313. [2021-08-12 16:02:32,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1313 states, 1312 states have (on average 2.7271341463414633) internal successors, (3578), 1312 states have internal predecessors, (3578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1313 states to 1313 states and 3578 transitions. [2021-08-12 16:02:32,229 INFO L78 Accepts]: Start accepts. Automaton has 1313 states and 3578 transitions. Word has length 50 [2021-08-12 16:02:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:32,229 INFO L482 AbstractCegarLoop]: Abstraction has 1313 states and 3578 transitions. [2021-08-12 16:02:32,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1313 states and 3578 transitions. [2021-08-12 16:02:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:32,232 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:32,232 INFO L550 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] [2021-08-12 16:02:32,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-12 16:02:32,445 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:32,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:32,445 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 6 times [2021-08-12 16:02:32,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:32,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619178455] [2021-08-12 16:02:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:32,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619178455] [2021-08-12 16:02:32,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619178455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769786520] [2021-08-12 16:02:32,522 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 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 [2021-08-12 16:02:32,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-12 16:02:32,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:32,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:32,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:32,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:32,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769786520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:32,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:32,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 16:02:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714752013] [2021-08-12 16:02:32,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:32,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:32,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:32,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:32,700 INFO L87 Difference]: Start difference. First operand 1313 states and 3578 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) [2021-08-12 16:02:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:32,992 INFO L93 Difference]: Finished difference Result 2059 states and 5529 transitions. [2021-08-12 16:02:32,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:32,993 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 [2021-08-12 16:02:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:33,000 INFO L225 Difference]: With dead ends: 2059 [2021-08-12 16:02:33,000 INFO L226 Difference]: Without dead ends: 1661 [2021-08-12 16:02:33,002 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:02:33,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-08-12 16:02:33,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1388. [2021-08-12 16:02:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.741888968997837) internal successors, (3803), 1387 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:33,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3803 transitions. [2021-08-12 16:02:33,052 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3803 transitions. Word has length 55 [2021-08-12 16:02:33,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:33,053 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3803 transitions. [2021-08-12 16:02:33,053 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) [2021-08-12 16:02:33,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3803 transitions. [2021-08-12 16:02:33,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:33,055 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:33,055 INFO L550 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] [2021-08-12 16:02:33,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-12 16:02:33,269 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 7 times [2021-08-12 16:02:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:33,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799188134] [2021-08-12 16:02:33,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:33,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:33,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799188134] [2021-08-12 16:02:33,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799188134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:33,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926261633] [2021-08-12 16:02:33,349 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 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 [2021-08-12 16:02:33,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:33,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:33,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:33,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926261633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:33,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:33,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-12 16:02:33,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054271014] [2021-08-12 16:02:33,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:33,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:33,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:33,545 INFO L87 Difference]: Start difference. First operand 1388 states and 3803 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) [2021-08-12 16:02:33,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:33,883 INFO L93 Difference]: Finished difference Result 2239 states and 6009 transitions. [2021-08-12 16:02:33,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:33,883 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 [2021-08-12 16:02:33,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:33,890 INFO L225 Difference]: With dead ends: 2239 [2021-08-12 16:02:33,890 INFO L226 Difference]: Without dead ends: 1841 [2021-08-12 16:02:33,892 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-08-12 16:02:33,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2021-08-12 16:02:33,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1463. [2021-08-12 16:02:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7688098495212037) internal successors, (4048), 1462 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:33,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 4048 transitions. [2021-08-12 16:02:33,945 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 4048 transitions. Word has length 55 [2021-08-12 16:02:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:33,945 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 4048 transitions. [2021-08-12 16:02:33,945 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) [2021-08-12 16:02:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 4048 transitions. [2021-08-12 16:02:33,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:33,947 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:33,948 INFO L550 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] [2021-08-12 16:02:34,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-12 16:02:34,170 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:34,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 8 times [2021-08-12 16:02:34,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:34,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164445014] [2021-08-12 16:02:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164445014] [2021-08-12 16:02:34,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164445014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947070476] [2021-08-12 16:02:34,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:02:34,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:34,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:34,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:34,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:34,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947070476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:34,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:34,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 16:02:34,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406367394] [2021-08-12 16:02:34,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:34,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:34,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:34,440 INFO L87 Difference]: Start difference. First operand 1463 states and 4048 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) [2021-08-12 16:02:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:34,779 INFO L93 Difference]: Finished difference Result 2986 states and 8143 transitions. [2021-08-12 16:02:34,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:34,779 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 [2021-08-12 16:02:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:34,790 INFO L225 Difference]: With dead ends: 2986 [2021-08-12 16:02:34,790 INFO L226 Difference]: Without dead ends: 2588 [2021-08-12 16:02:34,792 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2021-08-12 16:02:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2021-08-12 16:02:34,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 1643. [2021-08-12 16:02:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.805724725943971) internal successors, (4607), 1642 states have internal predecessors, (4607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:34,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4607 transitions. [2021-08-12 16:02:34,855 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4607 transitions. Word has length 55 [2021-08-12 16:02:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:34,855 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4607 transitions. [2021-08-12 16:02:34,855 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) [2021-08-12 16:02:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4607 transitions. [2021-08-12 16:02:34,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-12 16:02:34,858 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:34,858 INFO L550 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] [2021-08-12 16:02:35,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-12 16:02:35,082 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:35,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 9 times [2021-08-12 16:02:35,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:35,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934469464] [2021-08-12 16:02:35,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:35,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:35,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934469464] [2021-08-12 16:02:35,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934469464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:35,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489268407] [2021-08-12 16:02:35,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:35,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-12 16:02:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:35,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-12 16:02:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:35,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489268407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:35,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:35,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-08-12 16:02:35,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33595496] [2021-08-12 16:02:35,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-12 16:02:35,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:35,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-12 16:02:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-12 16:02:35,323 INFO L87 Difference]: Start difference. First operand 1643 states and 4607 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) [2021-08-12 16:02:35,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:35,707 INFO L93 Difference]: Finished difference Result 2448 states and 6793 transitions. [2021-08-12 16:02:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:35,708 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 [2021-08-12 16:02:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:35,716 INFO L225 Difference]: With dead ends: 2448 [2021-08-12 16:02:35,716 INFO L226 Difference]: Without dead ends: 1831 [2021-08-12 16:02:35,717 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:35,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2021-08-12 16:02:35,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1234. [2021-08-12 16:02:35,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.72992700729927) internal successors, (3366), 1233 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:35,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3366 transitions. [2021-08-12 16:02:35,764 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3366 transitions. Word has length 55 [2021-08-12 16:02:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:35,764 INFO L482 AbstractCegarLoop]: Abstraction has 1234 states and 3366 transitions. [2021-08-12 16:02:35,764 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) [2021-08-12 16:02:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3366 transitions. [2021-08-12 16:02:35,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 16:02:35,766 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:35,766 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-08-12 16:02:35,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-12 16:02:35,981 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1642632502, now seen corresponding path program 10 times [2021-08-12 16:02:35,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:35,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062508968] [2021-08-12 16:02:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:36,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:36,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062508968] [2021-08-12 16:02:36,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062508968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:36,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071675480] [2021-08-12 16:02:36,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:36,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:36,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:36,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:36,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071675480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:36,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:36,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-08-12 16:02:36,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533545353] [2021-08-12 16:02:36,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:36,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:36,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:36,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:36,288 INFO L87 Difference]: Start difference. First operand 1234 states and 3366 transitions. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:36,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:36,627 INFO L93 Difference]: Finished difference Result 2152 states and 5842 transitions. [2021-08-12 16:02:36,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:36,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 16:02:36,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:36,635 INFO L225 Difference]: With dead ends: 2152 [2021-08-12 16:02:36,635 INFO L226 Difference]: Without dead ends: 1690 [2021-08-12 16:02:36,636 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-08-12 16:02:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-08-12 16:02:36,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1319. [2021-08-12 16:02:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1319 states, 1318 states have (on average 2.6828528072837634) internal successors, (3536), 1318 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:36,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 3536 transitions. [2021-08-12 16:02:36,703 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 3536 transitions. Word has length 60 [2021-08-12 16:02:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:36,704 INFO L482 AbstractCegarLoop]: Abstraction has 1319 states and 3536 transitions. [2021-08-12 16:02:36,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 3536 transitions. [2021-08-12 16:02:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 16:02:36,706 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:36,706 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-08-12 16:02:36,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:36,929 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:36,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1005400838, now seen corresponding path program 11 times [2021-08-12 16:02:36,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:36,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620580107] [2021-08-12 16:02:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:36,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:37,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620580107] [2021-08-12 16:02:37,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620580107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631579008] [2021-08-12 16:02:37,020 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 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 [2021-08-12 16:02:37,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 16:02:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:37,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631579008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:37,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:37,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696803985] [2021-08-12 16:02:37,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:37,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:37,196 INFO L87 Difference]: Start difference. First operand 1319 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:37,547 INFO L93 Difference]: Finished difference Result 2374 states and 6159 transitions. [2021-08-12 16:02:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-12 16:02:37,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 16:02:37,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:37,554 INFO L225 Difference]: With dead ends: 2374 [2021-08-12 16:02:37,554 INFO L226 Difference]: Without dead ends: 1976 [2021-08-12 16:02:37,555 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:02:37,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2021-08-12 16:02:37,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1463. [2021-08-12 16:02:37,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 1462 states have (on average 2.7038303693570453) internal successors, (3953), 1462 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 3953 transitions. [2021-08-12 16:02:37,611 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 3953 transitions. Word has length 60 [2021-08-12 16:02:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:37,612 INFO L482 AbstractCegarLoop]: Abstraction has 1463 states and 3953 transitions. [2021-08-12 16:02:37,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 3953 transitions. [2021-08-12 16:02:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 16:02:37,614 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:37,614 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-08-12 16:02:37,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:37,829 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:37,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1024918474, now seen corresponding path program 12 times [2021-08-12 16:02:37,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:37,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454274598] [2021-08-12 16:02:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:37,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:37,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454274598] [2021-08-12 16:02:37,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454274598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:37,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966543951] [2021-08-12 16:02:37,916 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 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 [2021-08-12 16:02:37,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 16:02:37,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:37,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:37,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:38,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966543951] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:38,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:38,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-12 16:02:38,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353927231] [2021-08-12 16:02:38,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:38,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:38,096 INFO L87 Difference]: Start difference. First operand 1463 states and 3953 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:38,486 INFO L93 Difference]: Finished difference Result 2334 states and 6154 transitions. [2021-08-12 16:02:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:38,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 16:02:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:38,493 INFO L225 Difference]: With dead ends: 2334 [2021-08-12 16:02:38,493 INFO L226 Difference]: Without dead ends: 1936 [2021-08-12 16:02:38,495 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 202.8ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-08-12 16:02:38,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1538. [2021-08-12 16:02:38,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.718282368249837) internal successors, (4178), 1537 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:38,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 4178 transitions. [2021-08-12 16:02:38,557 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 4178 transitions. Word has length 60 [2021-08-12 16:02:38,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:38,557 INFO L482 AbstractCegarLoop]: Abstraction has 1538 states and 4178 transitions. [2021-08-12 16:02:38,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:38,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 4178 transitions. [2021-08-12 16:02:38,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 16:02:38,559 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:38,560 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-08-12 16:02:38,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-08-12 16:02:38,773 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:38,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:38,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1639157944, now seen corresponding path program 13 times [2021-08-12 16:02:38,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:38,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529139743] [2021-08-12 16:02:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:38,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:38,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529139743] [2021-08-12 16:02:38,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529139743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:38,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533708878] [2021-08-12 16:02:38,852 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 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 [2021-08-12 16:02:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:38,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:38,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:39,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533708878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:39,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:39,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:39,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939047119] [2021-08-12 16:02:39,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:39,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:39,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:39,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:39,013 INFO L87 Difference]: Start difference. First operand 1538 states and 4178 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:39,362 INFO L93 Difference]: Finished difference Result 2384 states and 6329 transitions. [2021-08-12 16:02:39,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-12 16:02:39,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 16:02:39,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:39,370 INFO L225 Difference]: With dead ends: 2384 [2021-08-12 16:02:39,370 INFO L226 Difference]: Without dead ends: 1986 [2021-08-12 16:02:39,371 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:02:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1986 states. [2021-08-12 16:02:39,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1986 to 1613. [2021-08-12 16:02:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.7313895781637716) internal successors, (4403), 1612 states have internal predecessors, (4403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4403 transitions. [2021-08-12 16:02:39,439 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4403 transitions. Word has length 60 [2021-08-12 16:02:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:39,439 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4403 transitions. [2021-08-12 16:02:39,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4403 transitions. [2021-08-12 16:02:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 16:02:39,442 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:39,442 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-08-12 16:02:39,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:39,657 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash -76084344, now seen corresponding path program 14 times [2021-08-12 16:02:39,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:39,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939600692] [2021-08-12 16:02:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:39,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:39,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939600692] [2021-08-12 16:02:39,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939600692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:39,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505396335] [2021-08-12 16:02:39,742 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 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 [2021-08-12 16:02:39,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:39,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:39,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505396335] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:39,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:39,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-08-12 16:02:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382596472] [2021-08-12 16:02:39,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:39,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:39,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:39,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:39,943 INFO L87 Difference]: Start difference. First operand 1613 states and 4403 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:40,381 INFO L93 Difference]: Finished difference Result 2469 states and 6619 transitions. [2021-08-12 16:02:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 16:02:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:40,389 INFO L225 Difference]: With dead ends: 2469 [2021-08-12 16:02:40,390 INFO L226 Difference]: Without dead ends: 2071 [2021-08-12 16:02:40,391 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2021-08-12 16:02:40,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-08-12 16:02:40,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1688. [2021-08-12 16:02:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1688 states, 1687 states have (on average 2.7551867219917012) internal successors, (4648), 1687 states have internal predecessors, (4648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1688 states to 1688 states and 4648 transitions. [2021-08-12 16:02:40,475 INFO L78 Accepts]: Start accepts. Automaton has 1688 states and 4648 transitions. Word has length 60 [2021-08-12 16:02:40,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:40,475 INFO L482 AbstractCegarLoop]: Abstraction has 1688 states and 4648 transitions. [2021-08-12 16:02:40,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1688 states and 4648 transitions. [2021-08-12 16:02:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 16:02:40,477 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:40,477 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-08-12 16:02:40,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-12 16:02:40,701 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:40,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1108731946, now seen corresponding path program 15 times [2021-08-12 16:02:40,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:40,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503952304] [2021-08-12 16:02:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:40,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:40,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503952304] [2021-08-12 16:02:40,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503952304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957000697] [2021-08-12 16:02:40,777 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 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 [2021-08-12 16:02:40,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 16:02:40,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:40,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:40,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:40,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957000697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:40,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:40,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:40,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927246800] [2021-08-12 16:02:40,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:40,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:40,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:40,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:40,948 INFO L87 Difference]: Start difference. First operand 1688 states and 4648 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:41,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:41,309 INFO L93 Difference]: Finished difference Result 3236 states and 8793 transitions. [2021-08-12 16:02:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:41,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 16:02:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:41,320 INFO L225 Difference]: With dead ends: 3236 [2021-08-12 16:02:41,320 INFO L226 Difference]: Without dead ends: 2838 [2021-08-12 16:02:41,321 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:41,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-08-12 16:02:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 1868. [2021-08-12 16:02:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 2.78896625602571) internal successors, (5207), 1867 states have internal predecessors, (5207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 5207 transitions. [2021-08-12 16:02:41,398 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 5207 transitions. Word has length 60 [2021-08-12 16:02:41,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:41,398 INFO L482 AbstractCegarLoop]: Abstraction has 1868 states and 5207 transitions. [2021-08-12 16:02:41,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:41,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 5207 transitions. [2021-08-12 16:02:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-12 16:02:41,401 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:41,401 INFO L550 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 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] [2021-08-12 16:02:41,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-12 16:02:41,625 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:41,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:41,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1086388696, now seen corresponding path program 16 times [2021-08-12 16:02:41,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:41,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906557582] [2021-08-12 16:02:41,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:41,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:41,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906557582] [2021-08-12 16:02:41,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906557582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:41,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288736720] [2021-08-12 16:02:41,709 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 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 [2021-08-12 16:02:41,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:41,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:41,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-12 16:02:41,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:41,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:41,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288736720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:41,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:41,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-08-12 16:02:41,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684557806] [2021-08-12 16:02:41,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-08-12 16:02:41,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:41,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-12 16:02:41,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-08-12 16:02:41,884 INFO L87 Difference]: Start difference. First operand 1868 states and 5207 transitions. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:42,285 INFO L93 Difference]: Finished difference Result 2723 states and 7493 transitions. [2021-08-12 16:02:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:02:42,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-12 16:02:42,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:42,292 INFO L225 Difference]: With dead ends: 2723 [2021-08-12 16:02:42,292 INFO L226 Difference]: Without dead ends: 2106 [2021-08-12 16:02:42,293 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 251.7ms TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2021-08-12 16:02:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 1513. [2021-08-12 16:02:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 2.7301587301587302) internal successors, (4128), 1512 states have internal predecessors, (4128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:42,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 4128 transitions. [2021-08-12 16:02:42,392 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 4128 transitions. Word has length 60 [2021-08-12 16:02:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:42,392 INFO L482 AbstractCegarLoop]: Abstraction has 1513 states and 4128 transitions. [2021-08-12 16:02:42,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 4128 transitions. [2021-08-12 16:02:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:42,394 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:42,394 INFO L550 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] [2021-08-12 16:02:42,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-12 16:02:42,612 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 17 times [2021-08-12 16:02:42,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:42,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037191268] [2021-08-12 16:02:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:42,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:42,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:42,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037191268] [2021-08-12 16:02:42,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037191268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:42,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629950307] [2021-08-12 16:02:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:42,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-12 16:02:42,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:42,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:42,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629950307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:42,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:42,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:42,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002773770] [2021-08-12 16:02:42,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:42,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:42,909 INFO L87 Difference]: Start difference. First operand 1513 states and 4128 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) [2021-08-12 16:02:43,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:43,273 INFO L93 Difference]: Finished difference Result 2359 states and 6279 transitions. [2021-08-12 16:02:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:02:43,274 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 [2021-08-12 16:02:43,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:43,280 INFO L225 Difference]: With dead ends: 2359 [2021-08-12 16:02:43,280 INFO L226 Difference]: Without dead ends: 1961 [2021-08-12 16:02:43,281 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 174.2ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-08-12 16:02:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1588. [2021-08-12 16:02:43,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1588 states, 1587 states have (on average 2.742911153119093) internal successors, (4353), 1587 states have internal predecessors, (4353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1588 states to 1588 states and 4353 transitions. [2021-08-12 16:02:43,367 INFO L78 Accepts]: Start accepts. Automaton has 1588 states and 4353 transitions. Word has length 65 [2021-08-12 16:02:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:43,367 INFO L482 AbstractCegarLoop]: Abstraction has 1588 states and 4353 transitions. [2021-08-12 16:02:43,367 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) [2021-08-12 16:02:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1588 states and 4353 transitions. [2021-08-12 16:02:43,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:43,369 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:43,370 INFO L550 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] [2021-08-12 16:02:43,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-12 16:02:43,593 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:43,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 18 times [2021-08-12 16:02:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:43,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897406210] [2021-08-12 16:02:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:43,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:43,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897406210] [2021-08-12 16:02:43,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897406210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:43,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255414735] [2021-08-12 16:02:43,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:43,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-12 16:02:43,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:43,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:43,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:43,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255414735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:43,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:43,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:43,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782032115] [2021-08-12 16:02:43,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:43,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:43,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:43,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:43,898 INFO L87 Difference]: Start difference. First operand 1588 states and 4353 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) [2021-08-12 16:02:44,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:44,339 INFO L93 Difference]: Finished difference Result 2529 states and 6694 transitions. [2021-08-12 16:02:44,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:44,339 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 [2021-08-12 16:02:44,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:44,346 INFO L225 Difference]: With dead ends: 2529 [2021-08-12 16:02:44,346 INFO L226 Difference]: Without dead ends: 2131 [2021-08-12 16:02:44,347 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:44,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-08-12 16:02:44,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1663. [2021-08-12 16:02:44,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7545126353790614) internal successors, (4578), 1662 states have internal predecessors, (4578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:44,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4578 transitions. [2021-08-12 16:02:44,431 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4578 transitions. Word has length 65 [2021-08-12 16:02:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:44,431 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4578 transitions. [2021-08-12 16:02:44,431 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) [2021-08-12 16:02:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4578 transitions. [2021-08-12 16:02:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:44,434 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:44,434 INFO L550 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] [2021-08-12 16:02:44,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-12 16:02:44,649 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 19 times [2021-08-12 16:02:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:44,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170153375] [2021-08-12 16:02:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:44,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170153375] [2021-08-12 16:02:44,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170153375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:44,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890362390] [2021-08-12 16:02:44,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:44,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:44,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890362390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:44,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:44,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:44,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372660845] [2021-08-12 16:02:44,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:44,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:44,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:44,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:44,926 INFO L87 Difference]: Start difference. First operand 1663 states and 4578 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) [2021-08-12 16:02:45,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:45,342 INFO L93 Difference]: Finished difference Result 2559 states and 6829 transitions. [2021-08-12 16:02:45,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:02:45,342 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 [2021-08-12 16:02:45,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:45,351 INFO L225 Difference]: With dead ends: 2559 [2021-08-12 16:02:45,351 INFO L226 Difference]: Without dead ends: 2161 [2021-08-12 16:02:45,353 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 197.7ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:02:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2161 states. [2021-08-12 16:02:45,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2161 to 1738. [2021-08-12 16:02:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.765112262521589) internal successors, (4803), 1737 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) [2021-08-12 16:02:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4803 transitions. [2021-08-12 16:02:45,463 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4803 transitions. Word has length 65 [2021-08-12 16:02:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:45,463 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4803 transitions. [2021-08-12 16:02:45,463 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) [2021-08-12 16:02:45,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4803 transitions. [2021-08-12 16:02:45,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:45,465 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:45,466 INFO L550 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] [2021-08-12 16:02:45,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:45,681 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:45,681 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 20 times [2021-08-12 16:02:45,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:45,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962231897] [2021-08-12 16:02:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:45,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:45,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962231897] [2021-08-12 16:02:45,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962231897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:45,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489907434] [2021-08-12 16:02:45,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:45,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:45,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:45,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489907434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:45,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:45,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-08-12 16:02:45,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440681155] [2021-08-12 16:02:45,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:45,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:45,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:45,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:45,925 INFO L87 Difference]: Start difference. First operand 1738 states and 4803 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) [2021-08-12 16:02:46,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:46,429 INFO L93 Difference]: Finished difference Result 2644 states and 7119 transitions. [2021-08-12 16:02:46,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:02:46,438 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 [2021-08-12 16:02:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:46,445 INFO L225 Difference]: With dead ends: 2644 [2021-08-12 16:02:46,445 INFO L226 Difference]: Without dead ends: 2246 [2021-08-12 16:02:46,446 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:02:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-08-12 16:02:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1813. [2021-08-12 16:02:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7858719646799117) internal successors, (5048), 1812 states have internal predecessors, (5048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5048 transitions. [2021-08-12 16:02:46,540 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5048 transitions. Word has length 65 [2021-08-12 16:02:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:46,541 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 5048 transitions. [2021-08-12 16:02:46,541 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) [2021-08-12 16:02:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5048 transitions. [2021-08-12 16:02:46,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:46,543 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:46,543 INFO L550 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] [2021-08-12 16:02:46,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-12 16:02:46,757 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:46,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:46,757 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 21 times [2021-08-12 16:02:46,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:46,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502300173] [2021-08-12 16:02:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:46,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:46,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502300173] [2021-08-12 16:02:46,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502300173] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:46,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659657016] [2021-08-12 16:02:46,833 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 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 [2021-08-12 16:02:46,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-12 16:02:46,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:46,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:46,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:47,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659657016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:47,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:47,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:47,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446916028] [2021-08-12 16:02:47,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:47,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:47,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:47,006 INFO L87 Difference]: Start difference. First operand 1813 states and 5048 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) [2021-08-12 16:02:47,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:47,458 INFO L93 Difference]: Finished difference Result 3386 states and 9243 transitions. [2021-08-12 16:02:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:47,459 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 [2021-08-12 16:02:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:47,467 INFO L225 Difference]: With dead ends: 3386 [2021-08-12 16:02:47,468 INFO L226 Difference]: Without dead ends: 2988 [2021-08-12 16:02:47,469 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-08-12 16:02:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2988 states. [2021-08-12 16:02:47,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2988 to 1993. [2021-08-12 16:02:47,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1992 states have (on average 2.8147590361445785) internal successors, (5607), 1992 states have internal predecessors, (5607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:47,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 5607 transitions. [2021-08-12 16:02:47,556 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 5607 transitions. Word has length 65 [2021-08-12 16:02:47,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:47,556 INFO L482 AbstractCegarLoop]: Abstraction has 1993 states and 5607 transitions. [2021-08-12 16:02:47,557 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) [2021-08-12 16:02:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 5607 transitions. [2021-08-12 16:02:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-12 16:02:47,559 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:47,559 INFO L550 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] [2021-08-12 16:02:47,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:47,773 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 22 times [2021-08-12 16:02:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:47,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060595651] [2021-08-12 16:02:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:47,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:47,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060595651] [2021-08-12 16:02:47,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060595651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:47,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142845769] [2021-08-12 16:02:47,886 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 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 [2021-08-12 16:02:47,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:47,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:47,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-12 16:02:47,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:48,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142845769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:48,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:48,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-08-12 16:02:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511536531] [2021-08-12 16:02:48,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-08-12 16:02:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-12 16:02:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-12 16:02:48,059 INFO L87 Difference]: Start difference. First operand 1993 states and 5607 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) [2021-08-12 16:02:48,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:48,509 INFO L93 Difference]: Finished difference Result 2848 states and 7893 transitions. [2021-08-12 16:02:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:48,509 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 [2021-08-12 16:02:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:48,516 INFO L225 Difference]: With dead ends: 2848 [2021-08-12 16:02:48,516 INFO L226 Difference]: Without dead ends: 2231 [2021-08-12 16:02:48,517 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=256, Invalid=674, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-08-12 16:02:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 1434. [2021-08-12 16:02:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 2.732728541521284) internal successors, (3916), 1433 states have internal predecessors, (3916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 3916 transitions. [2021-08-12 16:02:48,585 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 3916 transitions. Word has length 65 [2021-08-12 16:02:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:48,586 INFO L482 AbstractCegarLoop]: Abstraction has 1434 states and 3916 transitions. [2021-08-12 16:02:48,586 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) [2021-08-12 16:02:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 3916 transitions. [2021-08-12 16:02:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:48,588 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:48,588 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:48,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-08-12 16:02:48,801 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2053970119, now seen corresponding path program 23 times [2021-08-12 16:02:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:48,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023582501] [2021-08-12 16:02:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:48,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:48,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023582501] [2021-08-12 16:02:48,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023582501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:48,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924140916] [2021-08-12 16:02:48,917 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 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 [2021-08-12 16:02:48,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:02:48,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:48,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:48,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:49,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924140916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:49,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:49,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-08-12 16:02:49,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733755872] [2021-08-12 16:02:49,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:02:49,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:49,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:02:49,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:02:49,144 INFO L87 Difference]: Start difference. First operand 1434 states and 3916 transitions. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:49,502 INFO L93 Difference]: Finished difference Result 2402 states and 6492 transitions. [2021-08-12 16:02:49,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:49,502 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:49,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:49,509 INFO L225 Difference]: With dead ends: 2402 [2021-08-12 16:02:49,509 INFO L226 Difference]: Without dead ends: 1940 [2021-08-12 16:02:49,511 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 235.9ms TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:49,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-08-12 16:02:49,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1519. [2021-08-12 16:02:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 2.691699604743083) internal successors, (4086), 1518 states have internal predecessors, (4086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 4086 transitions. [2021-08-12 16:02:49,571 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 4086 transitions. Word has length 70 [2021-08-12 16:02:49,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:49,571 INFO L482 AbstractCegarLoop]: Abstraction has 1519 states and 4086 transitions. [2021-08-12 16:02:49,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:49,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 4086 transitions. [2021-08-12 16:02:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:49,573 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:49,573 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:49,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:49,788 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash -778605685, now seen corresponding path program 24 times [2021-08-12 16:02:49,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:49,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840907583] [2021-08-12 16:02:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:49,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:49,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840907583] [2021-08-12 16:02:49,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840907583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:49,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367866743] [2021-08-12 16:02:49,886 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 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 [2021-08-12 16:02:49,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:02:49,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:49,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:49,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:50,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367866743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:50,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:50,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:50,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012482890] [2021-08-12 16:02:50,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:50,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:50,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:50,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:50,070 INFO L87 Difference]: Start difference. First operand 1519 states and 4086 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:50,668 INFO L93 Difference]: Finished difference Result 2724 states and 7009 transitions. [2021-08-12 16:02:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-12 16:02:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:50,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:50,675 INFO L225 Difference]: With dead ends: 2724 [2021-08-12 16:02:50,675 INFO L226 Difference]: Without dead ends: 2326 [2021-08-12 16:02:50,676 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:02:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2326 states. [2021-08-12 16:02:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2326 to 1663. [2021-08-12 16:02:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 2.7093862815884475) internal successors, (4503), 1662 states have internal predecessors, (4503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 4503 transitions. [2021-08-12 16:02:50,745 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 4503 transitions. Word has length 70 [2021-08-12 16:02:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:50,746 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 4503 transitions. [2021-08-12 16:02:50,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 4503 transitions. [2021-08-12 16:02:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:50,748 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:50,748 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:50,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-12 16:02:50,949 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:50,949 INFO L82 PathProgramCache]: Analyzing trace with hash 220290651, now seen corresponding path program 25 times [2021-08-12 16:02:50,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:50,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851691341] [2021-08-12 16:02:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:51,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851691341] [2021-08-12 16:02:51,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851691341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:51,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781809759] [2021-08-12 16:02:51,059 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 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 [2021-08-12 16:02:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:51,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:51,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:51,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:51,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781809759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:51,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:51,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:51,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263659250] [2021-08-12 16:02:51,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:51,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:51,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:51,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:51,230 INFO L87 Difference]: Start difference. First operand 1663 states and 4503 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:51,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:51,838 INFO L93 Difference]: Finished difference Result 2684 states and 7004 transitions. [2021-08-12 16:02:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:02:51,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:51,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:51,847 INFO L225 Difference]: With dead ends: 2684 [2021-08-12 16:02:51,847 INFO L226 Difference]: Without dead ends: 2286 [2021-08-12 16:02:51,848 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:02:51,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2021-08-12 16:02:51,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1738. [2021-08-12 16:02:51,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1738 states, 1737 states have (on average 2.7219343696027636) internal successors, (4728), 1737 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1738 states to 1738 states and 4728 transitions. [2021-08-12 16:02:51,924 INFO L78 Accepts]: Start accepts. Automaton has 1738 states and 4728 transitions. Word has length 70 [2021-08-12 16:02:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:51,924 INFO L482 AbstractCegarLoop]: Abstraction has 1738 states and 4728 transitions. [2021-08-12 16:02:51,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1738 states and 4728 transitions. [2021-08-12 16:02:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:51,926 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:51,926 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:52,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:52,128 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:52,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:52,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1659037239, now seen corresponding path program 26 times [2021-08-12 16:02:52,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:52,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793806587] [2021-08-12 16:02:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:52,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:52,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793806587] [2021-08-12 16:02:52,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793806587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:52,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584493689] [2021-08-12 16:02:52,225 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 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 [2021-08-12 16:02:52,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:52,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:52,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:52,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:52,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584493689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:52,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:52,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:52,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294520772] [2021-08-12 16:02:52,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:52,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:52,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:52,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:52,448 INFO L87 Difference]: Start difference. First operand 1738 states and 4728 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:53,115 INFO L93 Difference]: Finished difference Result 2734 states and 7179 transitions. [2021-08-12 16:02:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-12 16:02:53,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:53,123 INFO L225 Difference]: With dead ends: 2734 [2021-08-12 16:02:53,124 INFO L226 Difference]: Without dead ends: 2336 [2021-08-12 16:02:53,125 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-08-12 16:02:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-08-12 16:02:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1813. [2021-08-12 16:02:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 2.7334437086092715) internal successors, (4953), 1812 states have internal predecessors, (4953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 4953 transitions. [2021-08-12 16:02:53,200 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 4953 transitions. Word has length 70 [2021-08-12 16:02:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:53,200 INFO L482 AbstractCegarLoop]: Abstraction has 1813 states and 4953 transitions. [2021-08-12 16:02:53,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 4953 transitions. [2021-08-12 16:02:53,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:53,202 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:53,202 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:53,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-12 16:02:53,413 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash 371282073, now seen corresponding path program 27 times [2021-08-12 16:02:53,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:53,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961536270] [2021-08-12 16:02:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:53,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:53,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:53,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961536270] [2021-08-12 16:02:53,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961536270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:53,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005278616] [2021-08-12 16:02:53,527 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 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 [2021-08-12 16:02:53,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:02:53,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:53,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:53,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005278616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:53,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:53,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:53,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78417540] [2021-08-12 16:02:53,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:53,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:53,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:53,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:53,696 INFO L87 Difference]: Start difference. First operand 1813 states and 4953 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:54,383 INFO L93 Difference]: Finished difference Result 2759 states and 7304 transitions. [2021-08-12 16:02:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:02:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:54,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:54,391 INFO L225 Difference]: With dead ends: 2759 [2021-08-12 16:02:54,391 INFO L226 Difference]: Without dead ends: 2361 [2021-08-12 16:02:54,392 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 282.9ms TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-08-12 16:02:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1888. [2021-08-12 16:02:54,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1887 states have (on average 2.7440381558028615) internal successors, (5178), 1887 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 5178 transitions. [2021-08-12 16:02:54,490 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 5178 transitions. Word has length 70 [2021-08-12 16:02:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:54,491 INFO L482 AbstractCegarLoop]: Abstraction has 1888 states and 5178 transitions. [2021-08-12 16:02:54,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 5178 transitions. [2021-08-12 16:02:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:54,493 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:54,493 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:54,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:02:54,716 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:54,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:54,716 INFO L82 PathProgramCache]: Analyzing trace with hash 985521543, now seen corresponding path program 28 times [2021-08-12 16:02:54,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:54,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59485757] [2021-08-12 16:02:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:54,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59485757] [2021-08-12 16:02:54,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59485757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:54,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466161807] [2021-08-12 16:02:54,818 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 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 [2021-08-12 16:02:54,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:02:54,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:54,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:54,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:54,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466161807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:54,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:54,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:54,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927960445] [2021-08-12 16:02:54,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:54,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:54,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:54,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:54,989 INFO L87 Difference]: Start difference. First operand 1888 states and 5178 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:55,610 INFO L93 Difference]: Finished difference Result 2784 states and 7429 transitions. [2021-08-12 16:02:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:02:55,610 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:55,617 INFO L225 Difference]: With dead ends: 2784 [2021-08-12 16:02:55,617 INFO L226 Difference]: Without dead ends: 2386 [2021-08-12 16:02:55,618 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:02:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2021-08-12 16:02:55,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1963. [2021-08-12 16:02:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.753822629969419) internal successors, (5403), 1962 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5403 transitions. [2021-08-12 16:02:55,697 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5403 transitions. Word has length 70 [2021-08-12 16:02:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:55,698 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5403 transitions. [2021-08-12 16:02:55,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:55,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5403 transitions. [2021-08-12 16:02:55,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:55,700 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:55,700 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:55,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-12 16:02:55,901 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:55,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:55,901 INFO L82 PathProgramCache]: Analyzing trace with hash -729720745, now seen corresponding path program 29 times [2021-08-12 16:02:55,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:55,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601902509] [2021-08-12 16:02:55,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:55,986 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:55,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:55,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601902509] [2021-08-12 16:02:55,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601902509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:55,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016104343] [2021-08-12 16:02:55,987 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 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 [2021-08-12 16:02:56,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:02:56,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:56,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:56,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:56,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016104343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:56,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:56,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:56,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172976707] [2021-08-12 16:02:56,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:56,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:56,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:56,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:56,154 INFO L87 Difference]: Start difference. First operand 1963 states and 5403 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:56,834 INFO L93 Difference]: Finished difference Result 2869 states and 7719 transitions. [2021-08-12 16:02:56,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:02:56,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:56,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:56,842 INFO L225 Difference]: With dead ends: 2869 [2021-08-12 16:02:56,842 INFO L226 Difference]: Without dead ends: 2471 [2021-08-12 16:02:56,843 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 312.9ms TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:02:56,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2021-08-12 16:02:56,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2038. [2021-08-12 16:02:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.7727049582719685) internal successors, (5648), 2037 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5648 transitions. [2021-08-12 16:02:56,928 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5648 transitions. Word has length 70 [2021-08-12 16:02:56,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:56,928 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5648 transitions. [2021-08-12 16:02:56,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:56,928 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5648 transitions. [2021-08-12 16:02:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:56,930 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:56,930 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:57,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-12 16:02:57,131 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:57,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:57,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1762368347, now seen corresponding path program 30 times [2021-08-12 16:02:57,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:57,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694636892] [2021-08-12 16:02:57,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:57,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:57,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694636892] [2021-08-12 16:02:57,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694636892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:57,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681040708] [2021-08-12 16:02:57,215 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 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 [2021-08-12 16:02:57,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:02:57,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:57,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:57,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681040708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:57,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:57,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-12 16:02:57,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008873264] [2021-08-12 16:02:57,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:57,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:57,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:57,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:57,386 INFO L87 Difference]: Start difference. First operand 2038 states and 5648 transitions. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:57,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:57,982 INFO L93 Difference]: Finished difference Result 3636 states and 9893 transitions. [2021-08-12 16:02:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:02:57,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:57,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:57,990 INFO L225 Difference]: With dead ends: 3636 [2021-08-12 16:02:57,991 INFO L226 Difference]: Without dead ends: 3238 [2021-08-12 16:02:57,991 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:02:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3238 states. [2021-08-12 16:02:58,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3238 to 2218. [2021-08-12 16:02:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2218 states, 2217 states have (on average 2.7997293640054126) internal successors, (6207), 2217 states have internal predecessors, (6207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 6207 transitions. [2021-08-12 16:02:58,094 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 6207 transitions. Word has length 70 [2021-08-12 16:02:58,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:58,095 INFO L482 AbstractCegarLoop]: Abstraction has 2218 states and 6207 transitions. [2021-08-12 16:02:58,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:58,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 6207 transitions. [2021-08-12 16:02:58,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-12 16:02:58,098 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:58,098 INFO L550 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-08-12 16:02:58,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-12 16:02:58,301 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:58,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1740025097, now seen corresponding path program 31 times [2021-08-12 16:02:58,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:58,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61549632] [2021-08-12 16:02:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:58,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:58,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61549632] [2021-08-12 16:02:58,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61549632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:58,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407181069] [2021-08-12 16:02:58,386 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 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 [2021-08-12 16:02:58,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-12 16:02:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:58,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407181069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:58,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:58,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-08-12 16:02:58,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066035916] [2021-08-12 16:02:58,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:02:58,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:58,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:02:58,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:02:58,578 INFO L87 Difference]: Start difference. First operand 2218 states and 6207 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:02:59,341 INFO L93 Difference]: Finished difference Result 3579 states and 9881 transitions. [2021-08-12 16:02:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:02:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-12 16:02:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:02:59,349 INFO L225 Difference]: With dead ends: 3579 [2021-08-12 16:02:59,349 INFO L226 Difference]: Without dead ends: 2876 [2021-08-12 16:02:59,350 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=357, Invalid=1049, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:02:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-08-12 16:02:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2253. [2021-08-12 16:02:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-08-12 16:02:59,440 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 70 [2021-08-12 16:02:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:02:59,441 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-08-12 16:02:59,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:02:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-08-12 16:02:59,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:02:59,444 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:02:59,444 INFO L550 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] [2021-08-12 16:02:59,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-12 16:02:59,657 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:02:59,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:02:59,658 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 32 times [2021-08-12 16:02:59,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:02:59,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59060439] [2021-08-12 16:02:59,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:02:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:02:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:59,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:02:59,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59060439] [2021-08-12 16:02:59,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59060439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:59,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803659137] [2021-08-12 16:02:59,773 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 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 [2021-08-12 16:02:59,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:02:59,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:02:59,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:02:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:02:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:02:59,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803659137] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:02:59,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:02:59,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:02:59,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634584669] [2021-08-12 16:02:59,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:02:59,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:02:59,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:02:59,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:02:59,982 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-08-12 16:03:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:00,618 INFO L93 Difference]: Finished difference Result 3124 states and 8409 transitions. [2021-08-12 16:03:00,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:03:00,618 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 [2021-08-12 16:03:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:00,630 INFO L225 Difference]: With dead ends: 3124 [2021-08-12 16:03:00,630 INFO L226 Difference]: Without dead ends: 2726 [2021-08-12 16:03:00,631 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-08-12 16:03:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-08-12 16:03:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-08-12 16:03:00,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-08-12 16:03:00,724 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-08-12 16:03:00,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:00,724 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-08-12 16:03:00,724 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) [2021-08-12 16:03:00,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-08-12 16:03:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:00,726 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:00,726 INFO L550 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] [2021-08-12 16:03:00,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:00,927 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 33 times [2021-08-12 16:03:00,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:00,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736563053] [2021-08-12 16:03:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:01,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:01,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736563053] [2021-08-12 16:03:01,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736563053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:01,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823180729] [2021-08-12 16:03:01,045 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 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 [2021-08-12 16:03:01,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:03:01,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:01,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:01,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:01,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823180729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:01,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:01,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:03:01,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231593208] [2021-08-12 16:03:01,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:01,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:01,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:01,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:01,253 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-08-12 16:03:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:02,058 INFO L93 Difference]: Finished difference Result 3269 states and 8699 transitions. [2021-08-12 16:03:02,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:02,060 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 [2021-08-12 16:03:02,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:02,084 INFO L225 Difference]: With dead ends: 3269 [2021-08-12 16:03:02,084 INFO L226 Difference]: Without dead ends: 2871 [2021-08-12 16:03:02,086 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:03:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-08-12 16:03:02,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2253. [2021-08-12 16:03:02,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-08-12 16:03:02,210 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-08-12 16:03:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:02,210 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-08-12 16:03:02,211 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) [2021-08-12 16:03:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-08-12 16:03:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:02,213 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:02,213 INFO L550 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] [2021-08-12 16:03:02,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-12 16:03:02,413 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:02,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:02,414 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 34 times [2021-08-12 16:03:02,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:02,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719031585] [2021-08-12 16:03:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:02,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:02,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719031585] [2021-08-12 16:03:02,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719031585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:02,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180602741] [2021-08-12 16:03:02,506 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 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 [2021-08-12 16:03:02,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:02,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:02,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180602741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:02,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:02,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:03:02,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133961521] [2021-08-12 16:03:02,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:02,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:02,662 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-08-12 16:03:03,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:03,457 INFO L93 Difference]: Finished difference Result 3224 states and 8609 transitions. [2021-08-12 16:03:03,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:03:03,457 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 [2021-08-12 16:03:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:03,466 INFO L225 Difference]: With dead ends: 3224 [2021-08-12 16:03:03,466 INFO L226 Difference]: Without dead ends: 2826 [2021-08-12 16:03:03,467 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:03:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2826 states. [2021-08-12 16:03:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2826 to 2253. [2021-08-12 16:03:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-08-12 16:03:03,563 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-08-12 16:03:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:03,564 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-08-12 16:03:03,564 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) [2021-08-12 16:03:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-08-12 16:03:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:03,566 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:03,566 INFO L550 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] [2021-08-12 16:03:03,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-12 16:03:03,767 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 35 times [2021-08-12 16:03:03,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:03,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323933648] [2021-08-12 16:03:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:03,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:03,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323933648] [2021-08-12 16:03:03,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323933648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:03,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121530262] [2021-08-12 16:03:03,868 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 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 [2021-08-12 16:03:03,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-12 16:03:03,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:03,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:03,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:04,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121530262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:04,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:04,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:03:04,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790542259] [2021-08-12 16:03:04,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:04,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:04,050 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-08-12 16:03:04,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:04,896 INFO L93 Difference]: Finished difference Result 3174 states and 8509 transitions. [2021-08-12 16:03:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:04,897 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 [2021-08-12 16:03:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:04,905 INFO L225 Difference]: With dead ends: 3174 [2021-08-12 16:03:04,905 INFO L226 Difference]: Without dead ends: 2776 [2021-08-12 16:03:04,906 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:03:04,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-08-12 16:03:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2253. [2021-08-12 16:03:05,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:05,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-08-12 16:03:05,074 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-08-12 16:03:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:05,074 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-08-12 16:03:05,074 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) [2021-08-12 16:03:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-08-12 16:03:05,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:05,076 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:05,076 INFO L550 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] [2021-08-12 16:03:05,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:05,277 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 36 times [2021-08-12 16:03:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:05,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347963893] [2021-08-12 16:03:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:05,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:05,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:05,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347963893] [2021-08-12 16:03:05,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347963893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:05,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285318207] [2021-08-12 16:03:05,365 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 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 [2021-08-12 16:03:05,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-12 16:03:05,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:05,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285318207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:05,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:05,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:03:05,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361640459] [2021-08-12 16:03:05,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:05,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:05,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:05,523 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-08-12 16:03:06,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:06,353 INFO L93 Difference]: Finished difference Result 3124 states and 8409 transitions. [2021-08-12 16:03:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:06,353 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 [2021-08-12 16:03:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:06,363 INFO L225 Difference]: With dead ends: 3124 [2021-08-12 16:03:06,363 INFO L226 Difference]: Without dead ends: 2726 [2021-08-12 16:03:06,364 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 257.1ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:03:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-08-12 16:03:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2253. [2021-08-12 16:03:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7899644760213143) internal successors, (6283), 2252 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:06,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6283 transitions. [2021-08-12 16:03:06,463 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6283 transitions. Word has length 75 [2021-08-12 16:03:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:06,463 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6283 transitions. [2021-08-12 16:03:06,464 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) [2021-08-12 16:03:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6283 transitions. [2021-08-12 16:03:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:06,466 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:06,466 INFO L550 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] [2021-08-12 16:03:06,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-12 16:03:06,666 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:06,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:06,667 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 37 times [2021-08-12 16:03:06,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:06,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38172580] [2021-08-12 16:03:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:06,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:06,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38172580] [2021-08-12 16:03:06,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38172580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:06,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791267787] [2021-08-12 16:03:06,763 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 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 [2021-08-12 16:03:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:06,937 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:06,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791267787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:06,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:06,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:03:06,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250523572] [2021-08-12 16:03:06,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:06,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:06,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:06,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:06,938 INFO L87 Difference]: Start difference. First operand 2253 states and 6283 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) [2021-08-12 16:03:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:07,797 INFO L93 Difference]: Finished difference Result 3134 states and 8459 transitions. [2021-08-12 16:03:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:03:07,797 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 [2021-08-12 16:03:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:07,806 INFO L225 Difference]: With dead ends: 3134 [2021-08-12 16:03:07,806 INFO L226 Difference]: Without dead ends: 2736 [2021-08-12 16:03:07,807 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=301, Invalid=889, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:03:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-08-12 16:03:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2253. [2021-08-12 16:03:07,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 2252 states have (on average 2.7921847246891653) internal successors, (6288), 2252 states have internal predecessors, (6288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 6288 transitions. [2021-08-12 16:03:07,908 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 6288 transitions. Word has length 75 [2021-08-12 16:03:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:07,908 INFO L482 AbstractCegarLoop]: Abstraction has 2253 states and 6288 transitions. [2021-08-12 16:03:07,908 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) [2021-08-12 16:03:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 6288 transitions. [2021-08-12 16:03:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:07,910 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:07,910 INFO L550 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] [2021-08-12 16:03:08,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:08,111 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:08,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:08,111 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 38 times [2021-08-12 16:03:08,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:08,111 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227672806] [2021-08-12 16:03:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:08,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:08,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227672806] [2021-08-12 16:03:08,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227672806] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:08,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943432448] [2021-08-12 16:03:08,195 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 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 [2021-08-12 16:03:08,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:08,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:08,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:08,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:08,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943432448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:08,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:08,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-12 16:03:08,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384435546] [2021-08-12 16:03:08,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-08-12 16:03:08,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:08,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-12 16:03:08,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-08-12 16:03:08,360 INFO L87 Difference]: Start difference. First operand 2253 states and 6288 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) [2021-08-12 16:03:09,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:09,126 INFO L93 Difference]: Finished difference Result 3876 states and 10583 transitions. [2021-08-12 16:03:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:09,127 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 [2021-08-12 16:03:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:09,136 INFO L225 Difference]: With dead ends: 3876 [2021-08-12 16:03:09,136 INFO L226 Difference]: Without dead ends: 3478 [2021-08-12 16:03:09,137 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:03:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3478 states. [2021-08-12 16:03:09,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3478 to 2433. [2021-08-12 16:03:09,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 2.815378289473684) internal successors, (6847), 2432 states have internal predecessors, (6847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 6847 transitions. [2021-08-12 16:03:09,282 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 6847 transitions. Word has length 75 [2021-08-12 16:03:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:09,282 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 6847 transitions. [2021-08-12 16:03:09,282 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) [2021-08-12 16:03:09,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 6847 transitions. [2021-08-12 16:03:09,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-12 16:03:09,285 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:09,285 INFO L550 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] [2021-08-12 16:03:09,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-12 16:03:09,509 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:09,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 39 times [2021-08-12 16:03:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:09,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254285103] [2021-08-12 16:03:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:09,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:09,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254285103] [2021-08-12 16:03:09,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254285103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:09,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408088227] [2021-08-12 16:03:09,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-08-12 16:03:09,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-12 16:03:09,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-12 16:03:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:09,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408088227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:09,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:09,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-08-12 16:03:09,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452301831] [2021-08-12 16:03:09,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-08-12 16:03:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-12 16:03:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-12 16:03:09,790 INFO L87 Difference]: Start difference. First operand 2433 states and 6847 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) [2021-08-12 16:03:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:10,679 INFO L93 Difference]: Finished difference Result 3338 states and 9233 transitions. [2021-08-12 16:03:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:10,679 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 [2021-08-12 16:03:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:10,688 INFO L225 Difference]: With dead ends: 3338 [2021-08-12 16:03:10,688 INFO L226 Difference]: Without dead ends: 2721 [2021-08-12 16:03:10,689 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 374.4ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:03:10,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2021-08-12 16:03:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2378. [2021-08-12 16:03:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.8115271350441735) internal successors, (6683), 2377 states have internal predecessors, (6683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:10,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6683 transitions. [2021-08-12 16:03:10,827 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6683 transitions. Word has length 75 [2021-08-12 16:03:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:10,827 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6683 transitions. [2021-08-12 16:03:10,827 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) [2021-08-12 16:03:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6683 transitions. [2021-08-12 16:03:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:10,830 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:10,830 INFO L550 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] [2021-08-12 16:03:11,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:11,030 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-08-12 16:03:11,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:11,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596561516] [2021-08-12 16:03:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:11,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:11,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596561516] [2021-08-12 16:03:11,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596561516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:11,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230185308] [2021-08-12 16:03:11,177 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 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 [2021-08-12 16:03:11,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:11,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230185308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:11,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:11,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-08-12 16:03:11,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849957264] [2021-08-12 16:03:11,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:03:11,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:11,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:03:11,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:03:11,384 INFO L87 Difference]: Start difference. First operand 2378 states and 6683 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:12,045 INFO L93 Difference]: Finished difference Result 3396 states and 9359 transitions. [2021-08-12 16:03:12,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:12,045 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:12,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:12,055 INFO L225 Difference]: With dead ends: 3396 [2021-08-12 16:03:12,055 INFO L226 Difference]: Without dead ends: 2934 [2021-08-12 16:03:12,056 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:03:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-08-12 16:03:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2463. [2021-08-12 16:03:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.7835093419983754) internal successors, (6853), 2462 states have internal predecessors, (6853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6853 transitions. [2021-08-12 16:03:12,181 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6853 transitions. Word has length 80 [2021-08-12 16:03:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:12,181 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6853 transitions. [2021-08-12 16:03:12,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6853 transitions. [2021-08-12 16:03:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:12,183 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:12,183 INFO L550 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] [2021-08-12 16:03:12,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-12 16:03:12,384 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:12,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:12,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-08-12 16:03:12,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:12,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104406380] [2021-08-12 16:03:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:12,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:12,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104406380] [2021-08-12 16:03:12,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104406380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:12,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145288190] [2021-08-12 16:03:12,511 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:12,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:12,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:12,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:12,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:12,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145288190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:12,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:12,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:12,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586300959] [2021-08-12 16:03:12,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:12,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:12,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:12,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:12,699 INFO L87 Difference]: Start difference. First operand 2463 states and 6853 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:13,816 INFO L93 Difference]: Finished difference Result 3689 states and 9689 transitions. [2021-08-12 16:03:13,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:03:13,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:13,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:13,826 INFO L225 Difference]: With dead ends: 3689 [2021-08-12 16:03:13,826 INFO L226 Difference]: Without dead ends: 3291 [2021-08-12 16:03:13,827 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-08-12 16:03:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2021-08-12 16:03:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 2478. [2021-08-12 16:03:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:13,963 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:13,964 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:13,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:13,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:13,967 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:13,967 INFO L550 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] [2021-08-12 16:03:14,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-12 16:03:14,167 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:14,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-08-12 16:03:14,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:14,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138920218] [2021-08-12 16:03:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:14,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:14,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138920218] [2021-08-12 16:03:14,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138920218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:14,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360651590] [2021-08-12 16:03:14,294 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:14,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:14,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:14,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360651590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:14,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:14,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-12 16:03:14,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910344008] [2021-08-12 16:03:14,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:14,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:14,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:14,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:14,536 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:15,793 INFO L93 Difference]: Finished difference Result 3574 states and 9459 transitions. [2021-08-12 16:03:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:15,805 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:03:15,805 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:03:15,806 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:03:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:03:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2478. [2021-08-12 16:03:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:15,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:15,975 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:15,975 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:15,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:15,978 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:15,978 INFO L550 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] [2021-08-12 16:03:16,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:16,178 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:16,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-08-12 16:03:16,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:16,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710597413] [2021-08-12 16:03:16,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:16,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:16,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710597413] [2021-08-12 16:03:16,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710597413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:16,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281118822] [2021-08-12 16:03:16,305 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:16,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:16,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:16,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281118822] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:16,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:16,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:16,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418783982] [2021-08-12 16:03:16,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:16,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:16,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:16,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:16,520 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:17,742 INFO L93 Difference]: Finished difference Result 3549 states and 9409 transitions. [2021-08-12 16:03:17,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-12 16:03:17,743 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:17,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:17,753 INFO L225 Difference]: With dead ends: 3549 [2021-08-12 16:03:17,753 INFO L226 Difference]: Without dead ends: 3151 [2021-08-12 16:03:17,754 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2021-08-12 16:03:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-08-12 16:03:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2478. [2021-08-12 16:03:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:17,901 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:17,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:17,901 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:17,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:17,902 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:17,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:17,904 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:17,904 INFO L550 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] [2021-08-12 16:03:18,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-12 16:03:18,105 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:18,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:18,105 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-08-12 16:03:18,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:18,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201654559] [2021-08-12 16:03:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:18,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:18,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201654559] [2021-08-12 16:03:18,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201654559] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:18,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921266524] [2021-08-12 16:03:18,216 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:18,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:18,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:18,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:18,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921266524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:18,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:18,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-12 16:03:18,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128897232] [2021-08-12 16:03:18,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:18,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:18,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:18,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:18,420 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:19,663 INFO L93 Difference]: Finished difference Result 3499 states and 9309 transitions. [2021-08-12 16:03:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:19,673 INFO L225 Difference]: With dead ends: 3499 [2021-08-12 16:03:19,673 INFO L226 Difference]: Without dead ends: 3101 [2021-08-12 16:03:19,674 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:03:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3101 states. [2021-08-12 16:03:19,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3101 to 2478. [2021-08-12 16:03:19,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:19,819 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:19,819 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:19,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:19,821 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:19,822 INFO L550 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] [2021-08-12 16:03:20,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:20,025 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:20,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:20,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-08-12 16:03:20,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:20,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573163273] [2021-08-12 16:03:20,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:20,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:20,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573163273] [2021-08-12 16:03:20,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573163273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:20,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466507950] [2021-08-12 16:03:20,124 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:20,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:20,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:20,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:20,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:20,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466507950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:20,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:20,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:20,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96626770] [2021-08-12 16:03:20,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:20,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:20,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:20,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:20,310 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:21,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:21,476 INFO L93 Difference]: Finished difference Result 3449 states and 9209 transitions. [2021-08-12 16:03:21,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:03:21,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:21,486 INFO L225 Difference]: With dead ends: 3449 [2021-08-12 16:03:21,487 INFO L226 Difference]: Without dead ends: 3051 [2021-08-12 16:03:21,487 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:03:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3051 states. [2021-08-12 16:03:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 2478. [2021-08-12 16:03:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:21,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:21,632 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:21,633 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:21,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:21,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:21,635 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:21,635 INFO L550 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] [2021-08-12 16:03:21,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:21,835 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-08-12 16:03:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:21,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181992622] [2021-08-12 16:03:21,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:21,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:21,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181992622] [2021-08-12 16:03:21,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181992622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:21,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916329840] [2021-08-12 16:03:21,971 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:22,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:22,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:22,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:22,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:22,143 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:22,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916329840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:22,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:22,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-12 16:03:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399557118] [2021-08-12 16:03:22,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:22,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:22,145 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:23,351 INFO L93 Difference]: Finished difference Result 3399 states and 9109 transitions. [2021-08-12 16:03:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:03:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:23,362 INFO L225 Difference]: With dead ends: 3399 [2021-08-12 16:03:23,362 INFO L226 Difference]: Without dead ends: 3001 [2021-08-12 16:03:23,363 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:03:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2021-08-12 16:03:23,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2478. [2021-08-12 16:03:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:23,532 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:23,532 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:23,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:23,534 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:23,534 INFO L550 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] [2021-08-12 16:03:23,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-12 16:03:23,735 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-08-12 16:03:23,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:23,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133157975] [2021-08-12 16:03:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:23,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:23,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133157975] [2021-08-12 16:03:23,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133157975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:23,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829883973] [2021-08-12 16:03:23,828 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:23,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:23,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:23,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:23,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:23,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829883973] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:23,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:23,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:23,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885200692] [2021-08-12 16:03:23,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:23,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:23,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:23,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:23,986 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:25,093 INFO L93 Difference]: Finished difference Result 3349 states and 9009 transitions. [2021-08-12 16:03:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:25,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:25,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:25,103 INFO L225 Difference]: With dead ends: 3349 [2021-08-12 16:03:25,103 INFO L226 Difference]: Without dead ends: 2951 [2021-08-12 16:03:25,104 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=305, Invalid=885, Unknown=0, NotChecked=0, Total=1190 [2021-08-12 16:03:25,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-08-12 16:03:25,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2478. [2021-08-12 16:03:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2477 states have (on average 2.7787646346386756) internal successors, (6883), 2477 states have internal predecessors, (6883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:25,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 6883 transitions. [2021-08-12 16:03:25,250 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 6883 transitions. Word has length 80 [2021-08-12 16:03:25,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:25,250 INFO L482 AbstractCegarLoop]: Abstraction has 2478 states and 6883 transitions. [2021-08-12 16:03:25,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:25,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 6883 transitions. [2021-08-12 16:03:25,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:25,253 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:25,253 INFO L550 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] [2021-08-12 16:03:25,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:25,469 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:25,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-08-12 16:03:25,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:25,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643287297] [2021-08-12 16:03:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:25,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:25,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643287297] [2021-08-12 16:03:25,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643287297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:25,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126477867] [2021-08-12 16:03:25,563 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:25,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:25,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:25,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:25,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126477867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:25,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:25,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-12 16:03:25,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799344380] [2021-08-12 16:03:25,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:25,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:25,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:25,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:25,730 INFO L87 Difference]: Start difference. First operand 2478 states and 6883 transitions. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:26,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:26,957 INFO L93 Difference]: Finished difference Result 3807 states and 10403 transitions. [2021-08-12 16:03:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:03:26,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:26,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:26,968 INFO L225 Difference]: With dead ends: 3807 [2021-08-12 16:03:26,968 INFO L226 Difference]: Without dead ends: 3056 [2021-08-12 16:03:26,969 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 386.3ms TimeCoverageRelationStatistics Valid=401, Invalid=1239, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:03:26,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3056 states. [2021-08-12 16:03:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3056 to 2388. [2021-08-12 16:03:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-08-12 16:03:27,119 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-08-12 16:03:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:27,119 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-08-12 16:03:27,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:27,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-08-12 16:03:27,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:27,121 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:27,121 INFO L550 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] [2021-08-12 16:03:27,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-12 16:03:27,322 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:27,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:27,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-08-12 16:03:27,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:27,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030841072] [2021-08-12 16:03:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:27,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030841072] [2021-08-12 16:03:27,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030841072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:27,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060630709] [2021-08-12 16:03:27,414 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:27,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:27,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060630709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:27,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:27,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-08-12 16:03:27,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062192999] [2021-08-12 16:03:27,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-08-12 16:03:27,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-12 16:03:27,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-12 16:03:27,572 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:28,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:28,616 INFO L93 Difference]: Finished difference Result 4036 states and 10993 transitions. [2021-08-12 16:03:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:28,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:28,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:28,634 INFO L225 Difference]: With dead ends: 4036 [2021-08-12 16:03:28,634 INFO L226 Difference]: Without dead ends: 3638 [2021-08-12 16:03:28,636 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 280.8ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:03:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-08-12 16:03:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-08-12 16:03:28,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-08-12 16:03:28,816 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-08-12 16:03:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:28,816 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-08-12 16:03:28,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:28,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-08-12 16:03:28,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-12 16:03:28,818 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:28,818 INFO L550 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] [2021-08-12 16:03:29,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-08-12 16:03:29,019 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:29,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-08-12 16:03:29,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:29,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169337782] [2021-08-12 16:03:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:29,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:29,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169337782] [2021-08-12 16:03:29,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169337782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:29,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882652308] [2021-08-12 16:03:29,117 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:29,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:29,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:29,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-12 16:03:29,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:29,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882652308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:29,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:29,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-08-12 16:03:29,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067267734] [2021-08-12 16:03:29,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:29,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:29,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:29,284 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:30,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:30,638 INFO L93 Difference]: Finished difference Result 3979 states and 10981 transitions. [2021-08-12 16:03:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:03:30,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-08-12 16:03:30,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:30,653 INFO L225 Difference]: With dead ends: 3979 [2021-08-12 16:03:30,653 INFO L226 Difference]: Without dead ends: 3276 [2021-08-12 16:03:30,655 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 470.5ms TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:03:30,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-08-12 16:03:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-08-12 16:03:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:30,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:30,874 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-08-12 16:03:30,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:30,875 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:30,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:30,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:30,878 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:30,878 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:31,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-12 16:03:31,101 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:31,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-08-12 16:03:31,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:31,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104486090] [2021-08-12 16:03:31,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:31,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:31,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104486090] [2021-08-12 16:03:31,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104486090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:31,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361511087] [2021-08-12 16:03:31,238 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:31,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:31,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:31,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:31,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361511087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:31,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:31,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:31,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874840141] [2021-08-12 16:03:31,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:31,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:31,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:31,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:31,428 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:32,680 INFO L93 Difference]: Finished difference Result 3574 states and 9609 transitions. [2021-08-12 16:03:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:03:32,680 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:32,691 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:03:32,691 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:03:32,692 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-08-12 16:03:32,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:03:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-08-12 16:03:32,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:32,855 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:32,855 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:32,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:32,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:32,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:32,857 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:32,857 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:33,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-12 16:03:33,058 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:33,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-08-12 16:03:33,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:33,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773296808] [2021-08-12 16:03:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:33,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773296808] [2021-08-12 16:03:33,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773296808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937443876] [2021-08-12 16:03:33,193 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:33,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:33,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:33,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:33,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937443876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:33,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:33,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:33,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268867212] [2021-08-12 16:03:33,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:33,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:33,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:33,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:33,393 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:35,037 INFO L93 Difference]: Finished difference Result 3769 states and 9999 transitions. [2021-08-12 16:03:35,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:35,037 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:35,048 INFO L225 Difference]: With dead ends: 3769 [2021-08-12 16:03:35,048 INFO L226 Difference]: Without dead ends: 3371 [2021-08-12 16:03:35,050 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 316.9ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:35,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-08-12 16:03:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-08-12 16:03:35,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:35,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:35,231 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:35,231 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:35,231 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:35,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:35,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:35,233 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:35,233 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:35,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:35,434 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:35,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:35,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-08-12 16:03:35,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:35,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044819436] [2021-08-12 16:03:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:35,544 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:35,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:35,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044819436] [2021-08-12 16:03:35,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044819436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:35,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208929270] [2021-08-12 16:03:35,544 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:35,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:35,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:35,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:35,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208929270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:35,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:35,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458246095] [2021-08-12 16:03:35,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:35,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:35,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:35,716 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:37,430 INFO L93 Difference]: Finished difference Result 3724 states and 9909 transitions. [2021-08-12 16:03:37,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:03:37,430 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:37,442 INFO L225 Difference]: With dead ends: 3724 [2021-08-12 16:03:37,442 INFO L226 Difference]: Without dead ends: 3326 [2021-08-12 16:03:37,444 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:03:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-08-12 16:03:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-08-12 16:03:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:37,647 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:37,647 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:37,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:37,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:37,649 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:37,649 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:37,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:37,850 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-08-12 16:03:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:37,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65448223] [2021-08-12 16:03:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:37,978 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:37,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:37,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65448223] [2021-08-12 16:03:37,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65448223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:37,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929718608] [2021-08-12 16:03:37,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:38,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:38,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:38,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:38,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:38,207 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:38,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929718608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:38,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:38,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:38,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472046062] [2021-08-12 16:03:38,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:38,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:38,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:38,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:38,208 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:39,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:39,895 INFO L93 Difference]: Finished difference Result 3674 states and 9809 transitions. [2021-08-12 16:03:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:03:39,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:39,906 INFO L225 Difference]: With dead ends: 3674 [2021-08-12 16:03:39,906 INFO L226 Difference]: Without dead ends: 3276 [2021-08-12 16:03:39,907 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:03:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-08-12 16:03:40,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-08-12 16:03:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:40,089 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:40,089 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:40,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:40,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:40,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:40,091 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:40,091 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:40,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:40,301 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-08-12 16:03:40,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:40,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117989766] [2021-08-12 16:03:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:40,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:40,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117989766] [2021-08-12 16:03:40,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117989766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:40,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800340029] [2021-08-12 16:03:40,400 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:40,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:40,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:40,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800340029] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:40,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:40,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:40,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815352550] [2021-08-12 16:03:40,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:40,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:40,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:40,564 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:42,155 INFO L93 Difference]: Finished difference Result 3624 states and 9709 transitions. [2021-08-12 16:03:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:03:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:42,166 INFO L225 Difference]: With dead ends: 3624 [2021-08-12 16:03:42,166 INFO L226 Difference]: Without dead ends: 3226 [2021-08-12 16:03:42,167 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 281.6ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:03:42,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-08-12 16:03:42,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-08-12 16:03:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:42,354 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:42,354 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:42,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:42,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:42,356 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:42,356 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:42,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-08-12 16:03:42,557 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:42,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:42,557 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-08-12 16:03:42,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:42,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756442060] [2021-08-12 16:03:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:42,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756442060] [2021-08-12 16:03:42,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756442060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:42,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094259805] [2021-08-12 16:03:42,660 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:42,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:42,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:42,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:42,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094259805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:42,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:42,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:42,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535040617] [2021-08-12 16:03:42,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:42,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:42,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:42,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:42,844 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:44,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:44,494 INFO L93 Difference]: Finished difference Result 3574 states and 9609 transitions. [2021-08-12 16:03:44,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:03:44,494 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:44,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:44,506 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:03:44,506 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:03:44,507 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:03:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:03:44,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-08-12 16:03:44,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:44,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:44,688 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:44,688 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:44,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:44,691 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:44,691 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:44,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:44,891 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:44,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:44,892 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-08-12 16:03:44,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:44,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329252389] [2021-08-12 16:03:44,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:45,003 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:45,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329252389] [2021-08-12 16:03:45,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329252389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:45,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748793525] [2021-08-12 16:03:45,004 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:45,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-12 16:03:45,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:45,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748793525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:45,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:45,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606842273] [2021-08-12 16:03:45,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:45,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:45,202 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:46,694 INFO L93 Difference]: Finished difference Result 3524 states and 9509 transitions. [2021-08-12 16:03:46,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:03:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:46,706 INFO L225 Difference]: With dead ends: 3524 [2021-08-12 16:03:46,706 INFO L226 Difference]: Without dead ends: 3126 [2021-08-12 16:03:46,706 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:03:46,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-08-12 16:03:46,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-08-12 16:03:46,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:46,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-08-12 16:03:46,886 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-08-12 16:03:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:46,886 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-08-12 16:03:46,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:46,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-08-12 16:03:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:46,888 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:46,888 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:47,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-12 16:03:47,089 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-08-12 16:03:47,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:47,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133103433] [2021-08-12 16:03:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:47,199 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:47,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133103433] [2021-08-12 16:03:47,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133103433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:47,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435951736] [2021-08-12 16:03:47,200 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:47,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:03:47,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:47,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:47,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:47,435 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:47,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435951736] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:47,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:47,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:47,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573667870] [2021-08-12 16:03:47,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:47,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:47,436 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:49,025 INFO L93 Difference]: Finished difference Result 3534 states and 9559 transitions. [2021-08-12 16:03:49,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:03:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:49,037 INFO L225 Difference]: With dead ends: 3534 [2021-08-12 16:03:49,037 INFO L226 Difference]: Without dead ends: 3136 [2021-08-12 16:03:49,038 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:03:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-08-12 16:03:49,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-08-12 16:03:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-08-12 16:03:49,219 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-08-12 16:03:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:49,219 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-08-12 16:03:49,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-08-12 16:03:49,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:49,221 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:49,221 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:49,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:49,422 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:49,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:49,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-08-12 16:03:49,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:49,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635361032] [2021-08-12 16:03:49,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:49,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:49,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635361032] [2021-08-12 16:03:49,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635361032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:49,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467948846] [2021-08-12 16:03:49,553 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:49,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-12 16:03:49,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:49,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:49,725 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:49,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467948846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:49,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:49,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-08-12 16:03:49,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953677662] [2021-08-12 16:03:49,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:49,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:49,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:49,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:49,726 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:51,205 INFO L93 Difference]: Finished difference Result 4276 states and 11683 transitions. [2021-08-12 16:03:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:03:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:51,223 INFO L225 Difference]: With dead ends: 4276 [2021-08-12 16:03:51,223 INFO L226 Difference]: Without dead ends: 3878 [2021-08-12 16:03:51,225 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 379.1ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:03:51,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-08-12 16:03:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-08-12 16:03:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-08-12 16:03:51,410 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-08-12 16:03:51,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:51,410 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-08-12 16:03:51,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-08-12 16:03:51,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-12 16:03:51,412 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:51,412 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:51,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-12 16:03:51,617 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:51,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-08-12 16:03:51,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:51,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840020622] [2021-08-12 16:03:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:51,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:51,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840020622] [2021-08-12 16:03:51,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840020622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:51,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622759814] [2021-08-12 16:03:51,713 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:51,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-12 16:03:51,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:51,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-12 16:03:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:51,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622759814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:51,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:51,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-08-12 16:03:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599588308] [2021-08-12 16:03:51,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:51,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:51,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:51,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:51,889 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:53,425 INFO L93 Difference]: Finished difference Result 4144 states and 11476 transitions. [2021-08-12 16:03:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:03:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-12 16:03:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:53,437 INFO L225 Difference]: With dead ends: 4144 [2021-08-12 16:03:53,437 INFO L226 Difference]: Without dead ends: 3441 [2021-08-12 16:03:53,438 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 452.2ms TimeCoverageRelationStatistics Valid=554, Invalid=1608, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:03:53,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-08-12 16:03:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-08-12 16:03:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:53,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-08-12 16:03:53,605 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-08-12 16:03:53,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:53,605 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-08-12 16:03:53,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:53,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-08-12 16:03:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:03:53,607 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:53,607 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:53,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:53,808 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-08-12 16:03:53,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:53,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844415247] [2021-08-12 16:03:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:53,943 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:53,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844415247] [2021-08-12 16:03:53,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844415247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:53,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229307160] [2021-08-12 16:03:53,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:53,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:03:53,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:54,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229307160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:54,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:54,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-08-12 16:03:54,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327866692] [2021-08-12 16:03:54,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:03:54,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:03:54,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:03:54,145 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:55,314 INFO L93 Difference]: Finished difference Result 2992 states and 8032 transitions. [2021-08-12 16:03:55,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:03:55,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:03:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:55,326 INFO L225 Difference]: With dead ends: 2992 [2021-08-12 16:03:55,326 INFO L226 Difference]: Without dead ends: 2530 [2021-08-12 16:03:55,327 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:03:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-08-12 16:03:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-08-12 16:03:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-08-12 16:03:55,532 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-08-12 16:03:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:55,533 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-08-12 16:03:55,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.9) internal successors, (118), 20 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-08-12 16:03:55,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:03:55,535 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:55,535 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:55,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-12 16:03:55,749 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:55,749 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-08-12 16:03:55,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:55,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181868823] [2021-08-12 16:03:55,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:55,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:55,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181868823] [2021-08-12 16:03:55,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181868823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:55,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158877741] [2021-08-12 16:03:55,877 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:55,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:03:55,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:55,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:03:55,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:56,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158877741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:56,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:56,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 16:03:56,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860694475] [2021-08-12 16:03:56,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:03:56,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:56,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:03:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:03:56,045 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:03:58,355 INFO L93 Difference]: Finished difference Result 3514 states and 8949 transitions. [2021-08-12 16:03:58,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-12 16:03:58,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:03:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:03:58,366 INFO L225 Difference]: With dead ends: 3514 [2021-08-12 16:03:58,366 INFO L226 Difference]: Without dead ends: 3116 [2021-08-12 16:03:58,367 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=260, Invalid=732, Unknown=0, NotChecked=0, Total=992 [2021-08-12 16:03:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-08-12 16:03:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-08-12 16:03:58,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-08-12 16:03:58,602 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-08-12 16:03:58,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:03:58,602 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-08-12 16:03:58,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:03:58,603 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-08-12 16:03:58,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:03:58,604 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:03:58,605 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:03:58,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-12 16:03:58,805 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:03:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:03:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-08-12 16:03:58,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:03:58,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608057397] [2021-08-12 16:03:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:03:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:03:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:58,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:03:58,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608057397] [2021-08-12 16:03:58,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608057397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:58,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611167550] [2021-08-12 16:03:58,955 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:03:59,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:03:59,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:03:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:03:59,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:03:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:03:59,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611167550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:03:59,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:03:59,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:03:59,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26633671] [2021-08-12 16:03:59,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:03:59,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:03:59,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:03:59,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:03:59,157 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:01,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:01,631 INFO L93 Difference]: Finished difference Result 3474 states and 8944 transitions. [2021-08-12 16:04:01,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:04:01,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:01,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:01,642 INFO L225 Difference]: With dead ends: 3474 [2021-08-12 16:04:01,642 INFO L226 Difference]: Without dead ends: 3076 [2021-08-12 16:04:01,643 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 316.6ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:04:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-08-12 16:04:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-08-12 16:04:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-08-12 16:04:01,894 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-08-12 16:04:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:01,894 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-08-12 16:04:01,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-08-12 16:04:01,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:01,896 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:01,896 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:02,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:02,097 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:02,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:02,097 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-08-12 16:04:02,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:02,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683046523] [2021-08-12 16:04:02,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:02,235 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:02,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:02,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683046523] [2021-08-12 16:04:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683046523] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:02,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523415220] [2021-08-12 16:04:02,236 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:02,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:04:02,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:02,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:02,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:02,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523415220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:02,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:02,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 16:04:02,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754347577] [2021-08-12 16:04:02,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:04:02,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:02,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:04:02,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:04:02,415 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:04,897 INFO L93 Difference]: Finished difference Result 3524 states and 9119 transitions. [2021-08-12 16:04:04,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-12 16:04:04,898 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:04,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:04,910 INFO L225 Difference]: With dead ends: 3524 [2021-08-12 16:04:04,910 INFO L226 Difference]: Without dead ends: 3126 [2021-08-12 16:04:04,910 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=273, Invalid=849, Unknown=0, NotChecked=0, Total=1122 [2021-08-12 16:04:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-08-12 16:04:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-08-12 16:04:05,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-08-12 16:04:05,169 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-08-12 16:04:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:05,169 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-08-12 16:04:05,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-08-12 16:04:05,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:05,171 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:05,171 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:05,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:05,373 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:05,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:05,373 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-08-12 16:04:05,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:05,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918801869] [2021-08-12 16:04:05,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:05,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:05,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918801869] [2021-08-12 16:04:05,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918801869] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:05,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788038427] [2021-08-12 16:04:05,502 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:05,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:04:05,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:05,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:05,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788038427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:05,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:05,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:05,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784522449] [2021-08-12 16:04:05,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:05,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:05,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:05,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:05,694 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:08,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:08,227 INFO L93 Difference]: Finished difference Result 3549 states and 9244 transitions. [2021-08-12 16:04:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:04:08,228 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:08,240 INFO L225 Difference]: With dead ends: 3549 [2021-08-12 16:04:08,241 INFO L226 Difference]: Without dead ends: 3151 [2021-08-12 16:04:08,242 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 339.4ms TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:04:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-08-12 16:04:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-08-12 16:04:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:08,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-08-12 16:04:08,526 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-08-12 16:04:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:08,527 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-08-12 16:04:08,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:08,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-08-12 16:04:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:08,529 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:08,529 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:08,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-12 16:04:08,745 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:08,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:08,745 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-08-12 16:04:08,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:08,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924833060] [2021-08-12 16:04:08,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:08,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:08,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924833060] [2021-08-12 16:04:08,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924833060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:08,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342814288] [2021-08-12 16:04:08,861 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:08,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:04:08,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:08,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:08,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:09,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342814288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:09,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:09,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 16:04:09,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91596904] [2021-08-12 16:04:09,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:04:09,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:09,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:04:09,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:04:09,031 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:11,425 INFO L93 Difference]: Finished difference Result 3574 states and 9369 transitions. [2021-08-12 16:04:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:04:11,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:11,437 INFO L225 Difference]: With dead ends: 3574 [2021-08-12 16:04:11,438 INFO L226 Difference]: Without dead ends: 3176 [2021-08-12 16:04:11,438 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:04:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-08-12 16:04:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-08-12 16:04:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-08-12 16:04:11,713 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-08-12 16:04:11,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:11,713 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-08-12 16:04:11,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-08-12 16:04:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:11,715 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:11,715 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:11,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:11,916 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-08-12 16:04:11,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:11,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877676315] [2021-08-12 16:04:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:12,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:12,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877676315] [2021-08-12 16:04:12,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877676315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:12,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486698160] [2021-08-12 16:04:12,061 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:12,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486698160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:12,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:12,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:12,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118419139] [2021-08-12 16:04:12,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:12,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:12,234 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:14,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:14,680 INFO L93 Difference]: Finished difference Result 3599 states and 9494 transitions. [2021-08-12 16:04:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:04:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:14,692 INFO L225 Difference]: With dead ends: 3599 [2021-08-12 16:04:14,692 INFO L226 Difference]: Without dead ends: 3201 [2021-08-12 16:04:14,693 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=369, Invalid=1191, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:04:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-08-12 16:04:14,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-08-12 16:04:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-08-12 16:04:14,976 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-08-12 16:04:14,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:14,977 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-08-12 16:04:14,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:14,977 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-08-12 16:04:14,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:14,979 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:14,979 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:15,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-12 16:04:15,180 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:15,180 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-08-12 16:04:15,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:15,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520134958] [2021-08-12 16:04:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:15,285 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:15,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:15,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520134958] [2021-08-12 16:04:15,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520134958] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:15,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531423050] [2021-08-12 16:04:15,286 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:15,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:04:15,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:15,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:15,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531423050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:15,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:15,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 16:04:15,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062526259] [2021-08-12 16:04:15,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:04:15,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:15,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:04:15,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:04:15,452 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:17,748 INFO L93 Difference]: Finished difference Result 3624 states and 9619 transitions. [2021-08-12 16:04:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:04:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:17,761 INFO L225 Difference]: With dead ends: 3624 [2021-08-12 16:04:17,761 INFO L226 Difference]: Without dead ends: 3226 [2021-08-12 16:04:17,762 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=347, Invalid=1059, Unknown=0, NotChecked=0, Total=1406 [2021-08-12 16:04:17,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-08-12 16:04:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-08-12 16:04:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-08-12 16:04:18,041 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-08-12 16:04:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:18,042 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-08-12 16:04:18,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:18,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-08-12 16:04:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:18,044 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:18,044 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:18,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:18,245 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-08-12 16:04:18,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:18,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716494495] [2021-08-12 16:04:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:18,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:18,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716494495] [2021-08-12 16:04:18,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716494495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:18,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525216810] [2021-08-12 16:04:18,356 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:18,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:04:18,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:18,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:18,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525216810] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:18,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:18,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:18,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039218363] [2021-08-12 16:04:18,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:18,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:18,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:18,543 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:20,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:20,830 INFO L93 Difference]: Finished difference Result 3649 states and 9744 transitions. [2021-08-12 16:04:20,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:04:20,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:20,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:20,844 INFO L225 Difference]: With dead ends: 3649 [2021-08-12 16:04:20,844 INFO L226 Difference]: Without dead ends: 3251 [2021-08-12 16:04:20,845 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 397.4ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:04:20,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-08-12 16:04:21,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-08-12 16:04:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-08-12 16:04:21,133 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-08-12 16:04:21,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:21,133 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-08-12 16:04:21,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:21,133 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-08-12 16:04:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:21,135 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:21,135 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:21,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-12 16:04:21,336 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:21,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-08-12 16:04:21,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:21,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363358264] [2021-08-12 16:04:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:21,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:21,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363358264] [2021-08-12 16:04:21,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363358264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:21,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480272012] [2021-08-12 16:04:21,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:21,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:04:21,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:21,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:21,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:21,597 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:21,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480272012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:21,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:21,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 16:04:21,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950161869] [2021-08-12 16:04:21,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:04:21,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:21,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:04:21,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:04:21,598 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:23,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:23,704 INFO L93 Difference]: Finished difference Result 3719 states and 9989 transitions. [2021-08-12 16:04:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:04:23,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:23,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:23,737 INFO L225 Difference]: With dead ends: 3719 [2021-08-12 16:04:23,737 INFO L226 Difference]: Without dead ends: 3321 [2021-08-12 16:04:23,738 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1152, Unknown=0, NotChecked=0, Total=1560 [2021-08-12 16:04:23,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-08-12 16:04:24,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-08-12 16:04:24,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:24,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-08-12 16:04:24,020 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-08-12 16:04:24,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:24,020 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-08-12 16:04:24,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:24,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-08-12 16:04:24,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:24,023 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:24,023 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:24,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:24,223 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-08-12 16:04:24,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:24,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337028121] [2021-08-12 16:04:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:24,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:24,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337028121] [2021-08-12 16:04:24,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337028121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:24,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927844038] [2021-08-12 16:04:24,329 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:24,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:04:24,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:24,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:24,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:24,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927844038] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:24,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:24,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:24,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654087546] [2021-08-12 16:04:24,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:24,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:24,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:24,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:24,508 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:26,744 INFO L93 Difference]: Finished difference Result 4297 states and 11743 transitions. [2021-08-12 16:04:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:04:26,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:26,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:26,758 INFO L225 Difference]: With dead ends: 4297 [2021-08-12 16:04:26,758 INFO L226 Difference]: Without dead ends: 3546 [2021-08-12 16:04:26,760 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:04:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-08-12 16:04:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-08-12 16:04:27,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-08-12 16:04:27,048 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-08-12 16:04:27,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:27,048 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-08-12 16:04:27,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-08-12 16:04:27,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:27,051 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:27,051 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:27,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-12 16:04:27,261 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-08-12 16:04:27,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:27,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593535952] [2021-08-12 16:04:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:27,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593535952] [2021-08-12 16:04:27,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593535952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:27,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759324843] [2021-08-12 16:04:27,361 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:27,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:04:27,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:27,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:27,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759324843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:27,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:27,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-12 16:04:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313606463] [2021-08-12 16:04:27,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-08-12 16:04:27,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-12 16:04:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-08-12 16:04:27,523 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:29,522 INFO L93 Difference]: Finished difference Result 4526 states and 12333 transitions. [2021-08-12 16:04:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:04:29,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:29,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:29,537 INFO L225 Difference]: With dead ends: 4526 [2021-08-12 16:04:29,537 INFO L226 Difference]: Without dead ends: 4128 [2021-08-12 16:04:29,538 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2021-08-12 16:04:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-08-12 16:04:29,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-08-12 16:04:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-08-12 16:04:29,822 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-08-12 16:04:29,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:29,822 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-08-12 16:04:29,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.294117647058823) internal successors, (90), 17 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:29,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-08-12 16:04:29,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-12 16:04:29,825 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:29,825 INFO L550 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:30,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:30,044 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:30,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:30,044 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-08-12 16:04:30,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:30,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143583157] [2021-08-12 16:04:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:30,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:30,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143583157] [2021-08-12 16:04:30,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143583157] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:30,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616933538] [2021-08-12 16:04:30,159 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:30,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-12 16:04:30,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:30,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616933538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:30,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:30,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-08-12 16:04:30,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088795332] [2021-08-12 16:04:30,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:30,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:30,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:30,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:30,334 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:32,362 INFO L93 Difference]: Finished difference Result 4013 states and 11033 transitions. [2021-08-12 16:04:32,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:04:32,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-08-12 16:04:32,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:32,376 INFO L225 Difference]: With dead ends: 4013 [2021-08-12 16:04:32,376 INFO L226 Difference]: Without dead ends: 3306 [2021-08-12 16:04:32,377 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:04:32,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-08-12 16:04:32,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-08-12 16:04:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-08-12 16:04:32,663 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-08-12 16:04:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:32,663 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-08-12 16:04:32,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-08-12 16:04:32,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:32,665 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:32,665 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:32,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:32,866 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:32,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:32,866 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-08-12 16:04:32,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:32,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304713294] [2021-08-12 16:04:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:33,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:33,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304713294] [2021-08-12 16:04:33,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304713294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:33,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687929040] [2021-08-12 16:04:33,022 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:33,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:04:33,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:33,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:33,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:33,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687929040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:33,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:33,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:04:33,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700721981] [2021-08-12 16:04:33,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:33,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:33,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:33,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:33,237 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:35,724 INFO L93 Difference]: Finished difference Result 3259 states and 8529 transitions. [2021-08-12 16:04:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:04:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:35,737 INFO L225 Difference]: With dead ends: 3259 [2021-08-12 16:04:35,737 INFO L226 Difference]: Without dead ends: 2861 [2021-08-12 16:04:35,738 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-12 16:04:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-08-12 16:04:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-08-12 16:04:36,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-08-12 16:04:36,065 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-08-12 16:04:36,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:36,065 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-08-12 16:04:36,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-08-12 16:04:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:36,067 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:36,067 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:36,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:36,268 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-08-12 16:04:36,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:36,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531202041] [2021-08-12 16:04:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:36,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:36,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531202041] [2021-08-12 16:04:36,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531202041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:36,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957907556] [2021-08-12 16:04:36,417 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:36,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:04:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:36,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:36,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957907556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:36,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:36,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:04:36,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636028273] [2021-08-12 16:04:36,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:36,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:36,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:36,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:36,604 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:39,986 INFO L93 Difference]: Finished difference Result 3579 states and 9244 transitions. [2021-08-12 16:04:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:04:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:40,000 INFO L225 Difference]: With dead ends: 3579 [2021-08-12 16:04:40,000 INFO L226 Difference]: Without dead ends: 3181 [2021-08-12 16:04:40,001 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:04:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-08-12 16:04:40,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-08-12 16:04:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-08-12 16:04:40,329 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-08-12 16:04:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:40,329 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-08-12 16:04:40,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-08-12 16:04:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:40,331 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:40,331 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:40,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:40,531 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-08-12 16:04:40,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:40,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787501671] [2021-08-12 16:04:40,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:40,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787501671] [2021-08-12 16:04:40,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787501671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:40,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560174632] [2021-08-12 16:04:40,656 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:40,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:04:40,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:40,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:40,826 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:40,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560174632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:40,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:40,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:04:40,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067290608] [2021-08-12 16:04:40,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:40,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:40,827 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:44,267 INFO L93 Difference]: Finished difference Result 3609 states and 9379 transitions. [2021-08-12 16:04:44,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:04:44,271 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:44,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:44,285 INFO L225 Difference]: With dead ends: 3609 [2021-08-12 16:04:44,285 INFO L226 Difference]: Without dead ends: 3211 [2021-08-12 16:04:44,286 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 325.0ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:04:44,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-08-12 16:04:44,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-08-12 16:04:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-08-12 16:04:44,623 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-08-12 16:04:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:44,623 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-08-12 16:04:44,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-08-12 16:04:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:44,626 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:44,626 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:44,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:44,827 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:44,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:44,828 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-08-12 16:04:44,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:44,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877973000] [2021-08-12 16:04:44,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:44,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877973000] [2021-08-12 16:04:44,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877973000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:44,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025363528] [2021-08-12 16:04:44,970 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:45,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:04:45,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:45,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:45,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:45,150 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:45,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025363528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:45,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:45,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:04:45,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111642092] [2021-08-12 16:04:45,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:45,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:45,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:45,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:45,151 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:48,629 INFO L93 Difference]: Finished difference Result 3634 states and 9504 transitions. [2021-08-12 16:04:48,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:04:48,629 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:48,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:48,643 INFO L225 Difference]: With dead ends: 3634 [2021-08-12 16:04:48,643 INFO L226 Difference]: Without dead ends: 3236 [2021-08-12 16:04:48,644 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:04:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-08-12 16:04:48,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-08-12 16:04:48,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:48,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-08-12 16:04:48,990 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-08-12 16:04:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:48,990 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-08-12 16:04:48,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:48,991 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-08-12 16:04:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:48,993 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:48,993 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:49,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:49,193 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:49,194 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-08-12 16:04:49,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:49,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068748520] [2021-08-12 16:04:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:49,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:49,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068748520] [2021-08-12 16:04:49,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068748520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:49,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557206701] [2021-08-12 16:04:49,315 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:49,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:04:49,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:49,486 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:49,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557206701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:49,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:49,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:04:49,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498214039] [2021-08-12 16:04:49,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:49,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:49,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:49,487 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:52,790 INFO L93 Difference]: Finished difference Result 3659 states and 9629 transitions. [2021-08-12 16:04:52,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:04:52,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:52,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:52,804 INFO L225 Difference]: With dead ends: 3659 [2021-08-12 16:04:52,804 INFO L226 Difference]: Without dead ends: 3261 [2021-08-12 16:04:52,805 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:04:52,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-08-12 16:04:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-08-12 16:04:53,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-08-12 16:04:53,167 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-08-12 16:04:53,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:53,167 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-08-12 16:04:53,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-08-12 16:04:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:53,169 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:53,170 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:53,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:53,370 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-08-12 16:04:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:53,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899624046] [2021-08-12 16:04:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:53,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:53,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899624046] [2021-08-12 16:04:53,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899624046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:53,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728455575] [2021-08-12 16:04:53,504 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:53,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:53,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:53,703 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:53,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728455575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:53,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:53,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:04:53,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066353230] [2021-08-12 16:04:53,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:04:53,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:53,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:04:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:04:53,704 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:04:57,042 INFO L93 Difference]: Finished difference Result 3684 states and 9754 transitions. [2021-08-12 16:04:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:04:57,042 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:04:57,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:04:57,057 INFO L225 Difference]: With dead ends: 3684 [2021-08-12 16:04:57,057 INFO L226 Difference]: Without dead ends: 3286 [2021-08-12 16:04:57,058 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 432.2ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:04:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-08-12 16:04:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-08-12 16:04:57,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-08-12 16:04:57,412 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-08-12 16:04:57,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:04:57,413 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-08-12 16:04:57,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:04:57,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-08-12 16:04:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:04:57,415 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:04:57,415 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:04:57,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-12 16:04:57,615 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:04:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:04:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-08-12 16:04:57,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:04:57,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712083579] [2021-08-12 16:04:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:04:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:04:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:57,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:04:57,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712083579] [2021-08-12 16:04:57,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712083579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:57,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681718080] [2021-08-12 16:04:57,749 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:04:57,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:04:57,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:04:57,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:04:57,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:04:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:04:57,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681718080] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:04:57,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:04:57,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:04:57,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969216061] [2021-08-12 16:04:57,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:04:57,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:04:57,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:04:57,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:04:57,959 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:01,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:01,166 INFO L93 Difference]: Finished difference Result 3709 states and 9879 transitions. [2021-08-12 16:05:01,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:05:01,166 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:01,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:01,181 INFO L225 Difference]: With dead ends: 3709 [2021-08-12 16:05:01,181 INFO L226 Difference]: Without dead ends: 3311 [2021-08-12 16:05:01,182 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:05:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-08-12 16:05:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-08-12 16:05:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-08-12 16:05:01,554 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-08-12 16:05:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:01,554 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-08-12 16:05:01,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-08-12 16:05:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:01,556 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:01,556 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:01,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:01,757 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:01,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:01,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-08-12 16:05:01,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:01,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465265138] [2021-08-12 16:05:01,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:01,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:01,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465265138] [2021-08-12 16:05:01,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465265138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:01,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488753240] [2021-08-12 16:05:01,875 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:01,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-12 16:05:01,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:02,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488753240] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:02,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:02,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:05:02,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974415356] [2021-08-12 16:05:02,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:02,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:02,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:02,089 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:05,187 INFO L93 Difference]: Finished difference Result 3734 states and 10004 transitions. [2021-08-12 16:05:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:05:05,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:05,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:05,202 INFO L225 Difference]: With dead ends: 3734 [2021-08-12 16:05:05,202 INFO L226 Difference]: Without dead ends: 3336 [2021-08-12 16:05:05,203 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 441.9ms TimeCoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:05:05,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-08-12 16:05:05,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-08-12 16:05:05,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:05,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-08-12 16:05:05,564 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-08-12 16:05:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:05,564 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-08-12 16:05:05,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-08-12 16:05:05,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:05,566 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:05,566 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:05,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-12 16:05:05,767 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:05,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-08-12 16:05:05,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:05,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084851153] [2021-08-12 16:05:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:05,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:05,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084851153] [2021-08-12 16:05:05,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084851153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:05,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024872724] [2021-08-12 16:05:05,882 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:05,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:05:05,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:05,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:05,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:06,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024872724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:06,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:06,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:05:06,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918588346] [2021-08-12 16:05:06,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:05:06,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:06,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:05:06,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:05:06,062 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:08,945 INFO L93 Difference]: Finished difference Result 3759 states and 10129 transitions. [2021-08-12 16:05:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:05:08,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:08,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:08,959 INFO L225 Difference]: With dead ends: 3759 [2021-08-12 16:05:08,960 INFO L226 Difference]: Without dead ends: 3361 [2021-08-12 16:05:08,961 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:05:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-08-12 16:05:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-08-12 16:05:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-08-12 16:05:09,323 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-08-12 16:05:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:09,324 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-08-12 16:05:09,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:09,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-08-12 16:05:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:09,326 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:09,326 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:09,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:09,527 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-08-12 16:05:09,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:09,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803049322] [2021-08-12 16:05:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:09,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:09,646 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:09,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:09,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803049322] [2021-08-12 16:05:09,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803049322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:09,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800476418] [2021-08-12 16:05:09,646 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:09,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-12 16:05:09,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:09,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:09,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:09,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800476418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:09,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:09,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:05:09,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092039303] [2021-08-12 16:05:09,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:09,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:09,826 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:12,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:12,729 INFO L93 Difference]: Finished difference Result 3844 states and 10419 transitions. [2021-08-12 16:05:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:05:12,729 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:12,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:12,743 INFO L225 Difference]: With dead ends: 3844 [2021-08-12 16:05:12,744 INFO L226 Difference]: Without dead ends: 3446 [2021-08-12 16:05:12,745 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 469.2ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:05:12,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-08-12 16:05:13,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-08-12 16:05:13,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-08-12 16:05:13,115 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-08-12 16:05:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:13,116 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-08-12 16:05:13,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-08-12 16:05:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:13,118 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:13,118 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:13,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:13,321 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:13,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:13,321 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-08-12 16:05:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:13,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222768723] [2021-08-12 16:05:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:13,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:13,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222768723] [2021-08-12 16:05:13,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222768723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:13,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112634836] [2021-08-12 16:05:13,457 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:13,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-12 16:05:13,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:13,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:13,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112634836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:13,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:13,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-12 16:05:13,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745475351] [2021-08-12 16:05:13,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-08-12 16:05:13,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:13,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-12 16:05:13,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-08-12 16:05:13,681 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:16,352 INFO L93 Difference]: Finished difference Result 4586 states and 12543 transitions. [2021-08-12 16:05:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:05:16,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:16,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:16,369 INFO L225 Difference]: With dead ends: 4586 [2021-08-12 16:05:16,369 INFO L226 Difference]: Without dead ends: 4188 [2021-08-12 16:05:16,370 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:05:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-08-12 16:05:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-08-12 16:05:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:16,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-08-12 16:05:16,729 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-08-12 16:05:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:16,729 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-08-12 16:05:16,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-08-12 16:05:16,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-12 16:05:16,731 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:16,731 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:16,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:16,934 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:16,934 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-08-12 16:05:16,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:16,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001064649] [2021-08-12 16:05:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:16,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:17,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:17,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001064649] [2021-08-12 16:05:17,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001064649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:17,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644741931] [2021-08-12 16:05:17,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:17,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-12 16:05:17,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:17,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644741931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:17,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:17,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-08-12 16:05:17,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231677233] [2021-08-12 16:05:17,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-08-12 16:05:17,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:17,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-12 16:05:17,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-08-12 16:05:17,238 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:19,820 INFO L93 Difference]: Finished difference Result 4048 states and 11193 transitions. [2021-08-12 16:05:19,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:05:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-08-12 16:05:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:19,836 INFO L225 Difference]: With dead ends: 4048 [2021-08-12 16:05:19,836 INFO L226 Difference]: Without dead ends: 3431 [2021-08-12 16:05:19,837 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 533.5ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:05:19,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-08-12 16:05:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-08-12 16:05:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:20,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-08-12 16:05:20,172 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-08-12 16:05:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:20,172 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-08-12 16:05:20,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-08-12 16:05:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:20,174 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:20,174 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:20,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:20,374 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:20,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:20,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-08-12 16:05:20,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:20,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271604764] [2021-08-12 16:05:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:20,539 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:20,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:20,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271604764] [2021-08-12 16:05:20,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271604764] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:20,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809045212] [2021-08-12 16:05:20,539 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:20,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:05:20,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:05:20,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:20,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809045212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:20,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:20,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2021-08-12 16:05:20,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383535360] [2021-08-12 16:05:20,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:05:20,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:20,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:05:20,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:05:20,784 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:23,084 INFO L93 Difference]: Finished difference Result 3152 states and 8442 transitions. [2021-08-12 16:05:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:05:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:23,100 INFO L225 Difference]: With dead ends: 3152 [2021-08-12 16:05:23,100 INFO L226 Difference]: Without dead ends: 2690 [2021-08-12 16:05:23,101 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:05:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-08-12 16:05:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-08-12 16:05:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-08-12 16:05:23,521 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-08-12 16:05:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:23,521 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-08-12 16:05:23,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.6521739130434785) internal successors, (130), 23 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-08-12 16:05:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:23,523 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:23,523 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:23,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:23,724 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:23,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:23,724 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-08-12 16:05:23,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:23,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684621960] [2021-08-12 16:05:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:23,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684621960] [2021-08-12 16:05:23,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684621960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:23,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168940519] [2021-08-12 16:05:23,882 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:23,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:05:23,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:23,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:23,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:24,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168940519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:24,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:24,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:05:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816407285] [2021-08-12 16:05:24,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:05:24,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:05:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:05:24,091 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:29,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:29,002 INFO L93 Difference]: Finished difference Result 3774 states and 9559 transitions. [2021-08-12 16:05:29,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-12 16:05:29,002 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:29,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:29,017 INFO L225 Difference]: With dead ends: 3774 [2021-08-12 16:05:29,017 INFO L226 Difference]: Without dead ends: 3376 [2021-08-12 16:05:29,017 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-08-12 16:05:29,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-08-12 16:05:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-08-12 16:05:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:29,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-08-12 16:05:29,480 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-08-12 16:05:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:29,480 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-08-12 16:05:29,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-08-12 16:05:29,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:29,482 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:29,482 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:29,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:29,693 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-08-12 16:05:29,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:29,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333762750] [2021-08-12 16:05:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:29,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:29,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333762750] [2021-08-12 16:05:29,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333762750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:29,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578422789] [2021-08-12 16:05:29,858 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:29,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:05:29,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:29,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:29,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:30,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578422789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:30,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:30,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 16:05:30,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688329043] [2021-08-12 16:05:30,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:05:30,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:30,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:05:30,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:05:30,072 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:35,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:35,133 INFO L93 Difference]: Finished difference Result 3734 states and 9554 transitions. [2021-08-12 16:05:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:05:35,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:35,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:35,157 INFO L225 Difference]: With dead ends: 3734 [2021-08-12 16:05:35,157 INFO L226 Difference]: Without dead ends: 3336 [2021-08-12 16:05:35,159 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 380.1ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:05:35,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-08-12 16:05:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-08-12 16:05:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:35,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-08-12 16:05:35,662 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-08-12 16:05:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:35,662 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-08-12 16:05:35,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-08-12 16:05:35,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:35,664 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:35,664 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:35,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-12 16:05:35,865 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:35,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-08-12 16:05:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:35,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535942773] [2021-08-12 16:05:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:36,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:36,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535942773] [2021-08-12 16:05:36,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535942773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:36,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668153670] [2021-08-12 16:05:36,018 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:36,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:05:36,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:36,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:36,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:36,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668153670] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:36,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:36,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:05:36,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448756953] [2021-08-12 16:05:36,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:05:36,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:05:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:05:36,212 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:41,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:41,272 INFO L93 Difference]: Finished difference Result 3784 states and 9729 transitions. [2021-08-12 16:05:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-12 16:05:41,273 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:41,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:41,289 INFO L225 Difference]: With dead ends: 3784 [2021-08-12 16:05:41,289 INFO L226 Difference]: Without dead ends: 3386 [2021-08-12 16:05:41,290 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-08-12 16:05:41,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-08-12 16:05:41,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-08-12 16:05:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-08-12 16:05:41,776 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-08-12 16:05:41,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:41,776 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-08-12 16:05:41,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:41,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-08-12 16:05:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:41,778 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:41,778 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:41,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:41,979 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:41,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:41,979 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-08-12 16:05:41,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:41,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845361994] [2021-08-12 16:05:41,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:41,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:42,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:42,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845361994] [2021-08-12 16:05:42,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845361994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:42,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611743848] [2021-08-12 16:05:42,128 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:42,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:05:42,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:42,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:42,366 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:42,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611743848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:42,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:42,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 16:05:42,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772622573] [2021-08-12 16:05:42,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:05:42,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:42,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:05:42,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:05:42,367 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:47,465 INFO L93 Difference]: Finished difference Result 3809 states and 9854 transitions. [2021-08-12 16:05:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:05:47,465 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:47,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:47,480 INFO L225 Difference]: With dead ends: 3809 [2021-08-12 16:05:47,481 INFO L226 Difference]: Without dead ends: 3411 [2021-08-12 16:05:47,481 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=434, Invalid=1372, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:05:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-08-12 16:05:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-08-12 16:05:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-08-12 16:05:48,001 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-08-12 16:05:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:48,001 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-08-12 16:05:48,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-08-12 16:05:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:48,003 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:48,003 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:48,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-08-12 16:05:48,204 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-08-12 16:05:48,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:48,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559670237] [2021-08-12 16:05:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:48,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:48,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559670237] [2021-08-12 16:05:48,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559670237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:48,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414880308] [2021-08-12 16:05:48,349 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:48,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:48,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:48,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414880308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:48,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:48,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:05:48,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671076858] [2021-08-12 16:05:48,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:05:48,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:48,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:05:48,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:05:48,557 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:53,433 INFO L93 Difference]: Finished difference Result 3834 states and 9979 transitions. [2021-08-12 16:05:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:05:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:53,449 INFO L225 Difference]: With dead ends: 3834 [2021-08-12 16:05:53,449 INFO L226 Difference]: Without dead ends: 3436 [2021-08-12 16:05:53,450 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 348.5ms TimeCoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:05:53,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-08-12 16:05:53,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-08-12 16:05:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-08-12 16:05:53,953 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-08-12 16:05:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:53,953 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-08-12 16:05:53,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-08-12 16:05:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:53,955 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:53,955 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:05:54,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:54,156 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:05:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:05:54,156 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-08-12 16:05:54,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:05:54,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613052666] [2021-08-12 16:05:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:05:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:05:54,302 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:54,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:05:54,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613052666] [2021-08-12 16:05:54,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613052666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:54,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220289758] [2021-08-12 16:05:54,303 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:05:54,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:05:54,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:05:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:05:54,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:05:54,504 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:05:54,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220289758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:05:54,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:05:54,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 16:05:54,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607619167] [2021-08-12 16:05:54,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:05:54,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:05:54,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:05:54,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:05:54,505 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:59,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:05:59,366 INFO L93 Difference]: Finished difference Result 3859 states and 10104 transitions. [2021-08-12 16:05:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:05:59,367 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:05:59,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:05:59,383 INFO L225 Difference]: With dead ends: 3859 [2021-08-12 16:05:59,383 INFO L226 Difference]: Without dead ends: 3461 [2021-08-12 16:05:59,384 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=468, Invalid=1512, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:05:59,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-08-12 16:05:59,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-08-12 16:05:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:59,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-08-12 16:05:59,904 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-08-12 16:05:59,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:05:59,905 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-08-12 16:05:59,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:05:59,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-08-12 16:05:59,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:05:59,907 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:05:59,907 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:00,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-12 16:06:00,108 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:00,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:00,108 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-08-12 16:06:00,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:00,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638908959] [2021-08-12 16:06:00,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:00,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:00,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638908959] [2021-08-12 16:06:00,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638908959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:00,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766629009] [2021-08-12 16:06:00,239 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:00,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:06:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:00,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766629009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:00,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:00,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:00,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930400449] [2021-08-12 16:06:00,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:00,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:00,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:00,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:00,464 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:05,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:05,045 INFO L93 Difference]: Finished difference Result 3884 states and 10229 transitions. [2021-08-12 16:06:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:06:05,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:05,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:05,062 INFO L225 Difference]: With dead ends: 3884 [2021-08-12 16:06:05,062 INFO L226 Difference]: Without dead ends: 3486 [2021-08-12 16:06:05,063 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:06:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-08-12 16:06:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-08-12 16:06:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-08-12 16:06:05,613 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-08-12 16:06:05,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:05,614 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-08-12 16:06:05,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:05,614 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-08-12 16:06:05,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:05,616 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:05,616 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:05,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-12 16:06:05,816 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:05,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-08-12 16:06:05,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:05,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912013785] [2021-08-12 16:06:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:05,950 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:05,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:05,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912013785] [2021-08-12 16:06:05,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912013785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:05,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431271805] [2021-08-12 16:06:05,951 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:06,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:06:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:06,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:06,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431271805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:06,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:06,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 16:06:06,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286996898] [2021-08-12 16:06:06,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:06:06,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:06:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:06:06,150 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:10,739 INFO L93 Difference]: Finished difference Result 3909 states and 10354 transitions. [2021-08-12 16:06:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:06:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:10,756 INFO L225 Difference]: With dead ends: 3909 [2021-08-12 16:06:10,756 INFO L226 Difference]: Without dead ends: 3511 [2021-08-12 16:06:10,757 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:06:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-08-12 16:06:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-08-12 16:06:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-08-12 16:06:11,317 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-08-12 16:06:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:11,317 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-08-12 16:06:11,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-08-12 16:06:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:11,320 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:11,320 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:11,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-12 16:06:11,520 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:11,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:11,521 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-08-12 16:06:11,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:11,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140737390] [2021-08-12 16:06:11,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:11,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:11,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140737390] [2021-08-12 16:06:11,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140737390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:11,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624951015] [2021-08-12 16:06:11,644 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:11,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:06:11,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:11,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:11,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:11,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624951015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:11,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:11,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:11,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77576503] [2021-08-12 16:06:11,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:11,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:11,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:11,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:11,846 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:16,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:16,178 INFO L93 Difference]: Finished difference Result 3934 states and 10479 transitions. [2021-08-12 16:06:16,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:06:16,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:16,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:16,195 INFO L225 Difference]: With dead ends: 3934 [2021-08-12 16:06:16,195 INFO L226 Difference]: Without dead ends: 3536 [2021-08-12 16:06:16,195 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:06:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-08-12 16:06:16,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-08-12 16:06:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-08-12 16:06:16,719 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-08-12 16:06:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:16,720 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-08-12 16:06:16,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-08-12 16:06:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:16,722 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:16,722 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:16,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:16,923 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:16,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:16,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-08-12 16:06:16,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:16,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404110330] [2021-08-12 16:06:16,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:17,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:17,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404110330] [2021-08-12 16:06:17,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404110330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:17,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628678536] [2021-08-12 16:06:17,050 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:17,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:06:17,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:17,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:17,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628678536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:17,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:17,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 16:06:17,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533867922] [2021-08-12 16:06:17,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:06:17,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:17,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:06:17,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:06:17,293 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:21,571 INFO L93 Difference]: Finished difference Result 3959 states and 10604 transitions. [2021-08-12 16:06:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:06:21,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:21,587 INFO L225 Difference]: With dead ends: 3959 [2021-08-12 16:06:21,587 INFO L226 Difference]: Without dead ends: 3561 [2021-08-12 16:06:21,588 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 511.2ms TimeCoverageRelationStatistics Valid=584, Invalid=1768, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:06:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-08-12 16:06:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-08-12 16:06:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-08-12 16:06:22,122 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-08-12 16:06:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:22,122 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-08-12 16:06:22,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-08-12 16:06:22,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:22,125 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:22,125 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:22,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-12 16:06:22,325 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:22,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:22,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-08-12 16:06:22,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:22,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017899738] [2021-08-12 16:06:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:22,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:22,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017899738] [2021-08-12 16:06:22,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017899738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:22,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905901446] [2021-08-12 16:06:22,456 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:22,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:22,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:22,645 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:22,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905901446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:22,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:22,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:22,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037541068] [2021-08-12 16:06:22,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:22,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:22,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:22,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:22,646 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:26,643 INFO L93 Difference]: Finished difference Result 3984 states and 10729 transitions. [2021-08-12 16:06:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:06:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:26,660 INFO L225 Difference]: With dead ends: 3984 [2021-08-12 16:06:26,661 INFO L226 Difference]: Without dead ends: 3586 [2021-08-12 16:06:26,661 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 419.0ms TimeCoverageRelationStatistics Valid=569, Invalid=1593, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:06:26,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-08-12 16:06:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-08-12 16:06:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-08-12 16:06:27,217 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-08-12 16:06:27,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:27,218 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-08-12 16:06:27,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-08-12 16:06:27,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:27,220 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:27,220 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:27,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:27,424 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-08-12 16:06:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:27,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567535930] [2021-08-12 16:06:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:27,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:27,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567535930] [2021-08-12 16:06:27,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567535930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:27,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883085853] [2021-08-12 16:06:27,564 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:27,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:06:27,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:27,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883085853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:27,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:27,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-08-12 16:06:27,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767026244] [2021-08-12 16:06:27,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:06:27,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:27,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:06:27,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:06:27,777 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:31,834 INFO L93 Difference]: Finished difference Result 4069 states and 11019 transitions. [2021-08-12 16:06:31,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 16:06:31,834 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:31,852 INFO L225 Difference]: With dead ends: 4069 [2021-08-12 16:06:31,852 INFO L226 Difference]: Without dead ends: 3671 [2021-08-12 16:06:31,853 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 16:06:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-08-12 16:06:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-08-12 16:06:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-08-12 16:06:32,382 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-08-12 16:06:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:32,383 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-08-12 16:06:32,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-08-12 16:06:32,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:32,385 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:32,385 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:32,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-08-12 16:06:32,586 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:32,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:32,586 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-08-12 16:06:32,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:32,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832977451] [2021-08-12 16:06:32,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:32,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:32,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832977451] [2021-08-12 16:06:32,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832977451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:32,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973062515] [2021-08-12 16:06:32,704 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:32,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:06:32,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:32,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:32,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:32,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973062515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:32,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:32,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:32,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147813752] [2021-08-12 16:06:32,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:32,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:32,889 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:36,732 INFO L93 Difference]: Finished difference Result 4836 states and 13193 transitions. [2021-08-12 16:06:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:06:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:36,751 INFO L225 Difference]: With dead ends: 4836 [2021-08-12 16:06:36,751 INFO L226 Difference]: Without dead ends: 4438 [2021-08-12 16:06:36,752 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 438.7ms TimeCoverageRelationStatistics Valid=660, Invalid=1692, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:06:36,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-08-12 16:06:37,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-08-12 16:06:37,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-08-12 16:06:37,272 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-08-12 16:06:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:37,272 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-08-12 16:06:37,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:37,273 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-08-12 16:06:37,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-12 16:06:37,275 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:37,275 INFO L550 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:37,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:37,476 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:37,476 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-08-12 16:06:37,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:37,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668649971] [2021-08-12 16:06:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:37,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:37,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668649971] [2021-08-12 16:06:37,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668649971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:37,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812832353] [2021-08-12 16:06:37,596 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:37,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:06:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-12 16:06:37,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:37,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812832353] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:37,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:37,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-08-12 16:06:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800037916] [2021-08-12 16:06:37,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-08-12 16:06:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:37,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-12 16:06:37,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-08-12 16:06:37,779 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:41,523 INFO L93 Difference]: Finished difference Result 4323 states and 11893 transitions. [2021-08-12 16:06:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 16:06:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-12 16:06:41,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:41,542 INFO L225 Difference]: With dead ends: 4323 [2021-08-12 16:06:41,542 INFO L226 Difference]: Without dead ends: 3706 [2021-08-12 16:06:41,543 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 572.1ms TimeCoverageRelationStatistics Valid=746, Invalid=1906, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 16:06:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2021-08-12 16:06:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 2313. [2021-08-12 16:06:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.737024221453287) internal successors, (6328), 2312 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6328 transitions. [2021-08-12 16:06:42,041 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6328 transitions. Word has length 100 [2021-08-12 16:06:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:42,041 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6328 transitions. [2021-08-12 16:06:42,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6328 transitions. [2021-08-12 16:06:42,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:06:42,043 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:42,043 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:42,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:42,244 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:42,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-08-12 16:06:42,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:42,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186386489] [2021-08-12 16:06:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:42,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:42,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186386489] [2021-08-12 16:06:42,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186386489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:42,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327278060] [2021-08-12 16:06:42,417 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:42,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:06:42,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:42,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:06:42,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:42,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327278060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:42,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:42,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:06:42,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416017091] [2021-08-12 16:06:42,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:06:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:06:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:06:42,618 INFO L87 Difference]: Start difference. First operand 2313 states and 6328 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:47,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:47,412 INFO L93 Difference]: Finished difference Result 3559 states and 9279 transitions. [2021-08-12 16:06:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-12 16:06:47,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:06:47,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:47,429 INFO L225 Difference]: With dead ends: 3559 [2021-08-12 16:06:47,429 INFO L226 Difference]: Without dead ends: 3161 [2021-08-12 16:06:47,430 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 408.6ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:06:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-08-12 16:06:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 2388. [2021-08-12 16:06:48,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.7452869710934227) internal successors, (6553), 2387 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) [2021-08-12 16:06:48,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6553 transitions. [2021-08-12 16:06:48,021 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6553 transitions. Word has length 105 [2021-08-12 16:06:48,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:48,022 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6553 transitions. [2021-08-12 16:06:48,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:48,022 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6553 transitions. [2021-08-12 16:06:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:06:48,024 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:48,024 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-12 16:06:48,224 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-08-12 16:06:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691097325] [2021-08-12 16:06:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:48,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:48,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691097325] [2021-08-12 16:06:48,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691097325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:48,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128431432] [2021-08-12 16:06:48,390 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:48,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:06:48,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:06:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:06:48,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:48,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128431432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:48,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:48,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:06:48,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670561173] [2021-08-12 16:06:48,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:06:48,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:06:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:06:48,610 INFO L87 Difference]: Start difference. First operand 2388 states and 6553 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:06:55,131 INFO L93 Difference]: Finished difference Result 3929 states and 10094 transitions. [2021-08-12 16:06:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:06:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:06:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:06:55,153 INFO L225 Difference]: With dead ends: 3929 [2021-08-12 16:06:55,153 INFO L226 Difference]: Without dead ends: 3531 [2021-08-12 16:06:55,154 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 407.4ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:06:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3531 states. [2021-08-12 16:06:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3531 to 2463. [2021-08-12 16:06:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 2.753046303818034) internal successors, (6778), 2462 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:55,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 6778 transitions. [2021-08-12 16:06:55,775 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 6778 transitions. Word has length 105 [2021-08-12 16:06:55,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:06:55,775 INFO L482 AbstractCegarLoop]: Abstraction has 2463 states and 6778 transitions. [2021-08-12 16:06:55,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:06:55,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 6778 transitions. [2021-08-12 16:06:55,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:06:55,777 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:06:55,777 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:06:55,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:55,978 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:06:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:06:55,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-08-12 16:06:55,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:06:55,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799123204] [2021-08-12 16:06:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:06:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:56,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:06:56,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799123204] [2021-08-12 16:06:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799123204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:56,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860766975] [2021-08-12 16:06:56,150 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:06:56,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:06:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:06:56,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:06:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:06:56,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860766975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:06:56,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:06:56,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:06:56,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595839316] [2021-08-12 16:06:56,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:06:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:06:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:06:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:06:56,347 INFO L87 Difference]: Start difference. First operand 2463 states and 6778 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:02,973 INFO L93 Difference]: Finished difference Result 3959 states and 10229 transitions. [2021-08-12 16:07:02,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:07:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:02,991 INFO L225 Difference]: With dead ends: 3959 [2021-08-12 16:07:02,991 INFO L226 Difference]: Without dead ends: 3561 [2021-08-12 16:07:02,992 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:07:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-08-12 16:07:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2538. [2021-08-12 16:07:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2538 states, 2537 states have (on average 2.760346866377611) internal successors, (7003), 2537 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) [2021-08-12 16:07:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2538 states to 2538 states and 7003 transitions. [2021-08-12 16:07:03,628 INFO L78 Accepts]: Start accepts. Automaton has 2538 states and 7003 transitions. Word has length 105 [2021-08-12 16:07:03,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:03,628 INFO L482 AbstractCegarLoop]: Abstraction has 2538 states and 7003 transitions. [2021-08-12 16:07:03,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:03,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2538 states and 7003 transitions. [2021-08-12 16:07:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:03,630 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:03,630 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:03,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:03,831 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:03,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-08-12 16:07:03,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:03,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241111121] [2021-08-12 16:07:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:03,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:03,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241111121] [2021-08-12 16:07:03,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241111121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:03,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207827281] [2021-08-12 16:07:03,988 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:04,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:07:04,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:04,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207827281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:04,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:04,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:04,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960231277] [2021-08-12 16:07:04,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:04,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:04,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:04,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:04,198 INFO L87 Difference]: Start difference. First operand 2538 states and 7003 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:10,888 INFO L93 Difference]: Finished difference Result 3984 states and 10354 transitions. [2021-08-12 16:07:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:07:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:10,907 INFO L225 Difference]: With dead ends: 3984 [2021-08-12 16:07:10,907 INFO L226 Difference]: Without dead ends: 3586 [2021-08-12 16:07:10,908 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:07:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-08-12 16:07:11,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 2613. [2021-08-12 16:07:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2612 states have (on average 2.767228177641654) internal successors, (7228), 2612 states have internal predecessors, (7228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 7228 transitions. [2021-08-12 16:07:11,564 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 7228 transitions. Word has length 105 [2021-08-12 16:07:11,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:11,564 INFO L482 AbstractCegarLoop]: Abstraction has 2613 states and 7228 transitions. [2021-08-12 16:07:11,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:11,564 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 7228 transitions. [2021-08-12 16:07:11,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:11,566 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:11,566 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:11,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-12 16:07:11,767 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:11,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-08-12 16:07:11,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:11,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927500503] [2021-08-12 16:07:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:11,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927500503] [2021-08-12 16:07:11,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927500503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:11,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054334033] [2021-08-12 16:07:11,910 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:11,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:07:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:11,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:11,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:12,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054334033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:12,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:12,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:12,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952470252] [2021-08-12 16:07:12,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:12,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:12,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:12,118 INFO L87 Difference]: Start difference. First operand 2613 states and 7228 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:18,619 INFO L93 Difference]: Finished difference Result 4009 states and 10479 transitions. [2021-08-12 16:07:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:07:18,620 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:18,637 INFO L225 Difference]: With dead ends: 4009 [2021-08-12 16:07:18,637 INFO L226 Difference]: Without dead ends: 3611 [2021-08-12 16:07:18,638 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 395.4ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-08-12 16:07:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3611 states. [2021-08-12 16:07:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3611 to 2688. [2021-08-12 16:07:19,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 2.773725344250093) internal successors, (7453), 2687 states have internal predecessors, (7453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 7453 transitions. [2021-08-12 16:07:19,299 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 7453 transitions. Word has length 105 [2021-08-12 16:07:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:19,299 INFO L482 AbstractCegarLoop]: Abstraction has 2688 states and 7453 transitions. [2021-08-12 16:07:19,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 7453 transitions. [2021-08-12 16:07:19,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:19,301 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:19,302 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:19,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-12 16:07:19,505 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:19,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-08-12 16:07:19,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:19,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457952389] [2021-08-12 16:07:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:19,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:19,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457952389] [2021-08-12 16:07:19,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457952389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:19,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962598163] [2021-08-12 16:07:19,659 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:19,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:07:19,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:19,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:19,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962598163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:19,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:19,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:19,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123655769] [2021-08-12 16:07:19,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:19,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:19,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:19,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:19,867 INFO L87 Difference]: Start difference. First operand 2688 states and 7453 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:26,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:26,286 INFO L93 Difference]: Finished difference Result 4034 states and 10604 transitions. [2021-08-12 16:07:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:07:26,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:26,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:26,305 INFO L225 Difference]: With dead ends: 4034 [2021-08-12 16:07:26,305 INFO L226 Difference]: Without dead ends: 3636 [2021-08-12 16:07:26,306 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 16:07:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2021-08-12 16:07:26,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2763. [2021-08-12 16:07:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2763 states, 2762 states have (on average 2.779869659666908) internal successors, (7678), 2762 states have internal predecessors, (7678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:26,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2763 states to 2763 states and 7678 transitions. [2021-08-12 16:07:26,960 INFO L78 Accepts]: Start accepts. Automaton has 2763 states and 7678 transitions. Word has length 105 [2021-08-12 16:07:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:26,960 INFO L482 AbstractCegarLoop]: Abstraction has 2763 states and 7678 transitions. [2021-08-12 16:07:26,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 2763 states and 7678 transitions. [2021-08-12 16:07:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:26,963 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:26,963 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:27,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-12 16:07:27,164 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-08-12 16:07:27,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:27,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400367371] [2021-08-12 16:07:27,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:27,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400367371] [2021-08-12 16:07:27,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400367371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300053650] [2021-08-12 16:07:27,312 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:27,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:07:27,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:27,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:27,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:27,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300053650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:27,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:27,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:27,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754457708] [2021-08-12 16:07:27,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:27,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:27,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:27,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:27,508 INFO L87 Difference]: Start difference. First operand 2763 states and 7678 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:33,655 INFO L93 Difference]: Finished difference Result 4059 states and 10729 transitions. [2021-08-12 16:07:33,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:07:33,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:33,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:33,673 INFO L225 Difference]: With dead ends: 4059 [2021-08-12 16:07:33,673 INFO L226 Difference]: Without dead ends: 3661 [2021-08-12 16:07:33,674 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-08-12 16:07:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3661 states. [2021-08-12 16:07:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3661 to 2838. [2021-08-12 16:07:34,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2838 states, 2837 states have (on average 2.785689108212901) internal successors, (7903), 2837 states have internal predecessors, (7903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:34,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 7903 transitions. [2021-08-12 16:07:34,348 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 7903 transitions. Word has length 105 [2021-08-12 16:07:34,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:34,348 INFO L482 AbstractCegarLoop]: Abstraction has 2838 states and 7903 transitions. [2021-08-12 16:07:34,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 7903 transitions. [2021-08-12 16:07:34,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:34,351 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:34,351 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:34,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:34,552 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:34,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:34,553 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-08-12 16:07:34,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:34,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874059919] [2021-08-12 16:07:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:34,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:34,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874059919] [2021-08-12 16:07:34,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874059919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:34,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212287129] [2021-08-12 16:07:34,692 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:34,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:07:34,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:34,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:34,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:34,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212287129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:34,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:34,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:34,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549862420] [2021-08-12 16:07:34,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:34,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:34,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:34,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:34,918 INFO L87 Difference]: Start difference. First operand 2838 states and 7903 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:41,000 INFO L93 Difference]: Finished difference Result 4084 states and 10854 transitions. [2021-08-12 16:07:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:07:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:41,018 INFO L225 Difference]: With dead ends: 4084 [2021-08-12 16:07:41,018 INFO L226 Difference]: Without dead ends: 3686 [2021-08-12 16:07:41,019 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 16:07:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3686 states. [2021-08-12 16:07:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3686 to 2913. [2021-08-12 16:07:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 2.791208791208791) internal successors, (8128), 2912 states have internal predecessors, (8128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 8128 transitions. [2021-08-12 16:07:41,678 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 8128 transitions. Word has length 105 [2021-08-12 16:07:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:41,679 INFO L482 AbstractCegarLoop]: Abstraction has 2913 states and 8128 transitions. [2021-08-12 16:07:41,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 8128 transitions. [2021-08-12 16:07:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:41,681 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:41,681 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:41,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-08-12 16:07:41,882 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-08-12 16:07:41,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:41,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050195494] [2021-08-12 16:07:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:41,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:42,037 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:42,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050195494] [2021-08-12 16:07:42,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050195494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:42,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759827392] [2021-08-12 16:07:42,038 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:42,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:42,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:42,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759827392] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:42,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:42,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:42,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465922006] [2021-08-12 16:07:42,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:42,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:42,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:42,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:42,231 INFO L87 Difference]: Start difference. First operand 2913 states and 8128 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:47,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:47,929 INFO L93 Difference]: Finished difference Result 4109 states and 10979 transitions. [2021-08-12 16:07:47,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:07:47,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:47,949 INFO L225 Difference]: With dead ends: 4109 [2021-08-12 16:07:47,949 INFO L226 Difference]: Without dead ends: 3711 [2021-08-12 16:07:47,950 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-08-12 16:07:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3711 states. [2021-08-12 16:07:48,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3711 to 2988. [2021-08-12 16:07:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2988 states, 2987 states have (on average 2.7964512889186475) internal successors, (8353), 2987 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:48,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2988 states to 2988 states and 8353 transitions. [2021-08-12 16:07:48,605 INFO L78 Accepts]: Start accepts. Automaton has 2988 states and 8353 transitions. Word has length 105 [2021-08-12 16:07:48,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:48,605 INFO L482 AbstractCegarLoop]: Abstraction has 2988 states and 8353 transitions. [2021-08-12 16:07:48,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:48,605 INFO L276 IsEmpty]: Start isEmpty. Operand 2988 states and 8353 transitions. [2021-08-12 16:07:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:48,608 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:48,608 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:48,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-12 16:07:48,808 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:48,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:48,809 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-08-12 16:07:48,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:48,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726697767] [2021-08-12 16:07:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:48,959 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:48,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726697767] [2021-08-12 16:07:48,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726697767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:48,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041029104] [2021-08-12 16:07:48,959 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:49,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:07:49,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:49,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:49,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041029104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:49,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:49,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:07:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25416121] [2021-08-12 16:07:49,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:07:49,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:07:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:07:49,165 INFO L87 Difference]: Start difference. First operand 2988 states and 8353 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:07:54,778 INFO L93 Difference]: Finished difference Result 4134 states and 11104 transitions. [2021-08-12 16:07:54,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 16:07:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:07:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:07:54,798 INFO L225 Difference]: With dead ends: 4134 [2021-08-12 16:07:54,798 INFO L226 Difference]: Without dead ends: 3736 [2021-08-12 16:07:54,799 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 544.3ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 16:07:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-08-12 16:07:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3063. [2021-08-12 16:07:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3063 states, 3062 states have (on average 2.8014369693011103) internal successors, (8578), 3062 states have internal predecessors, (8578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3063 states to 3063 states and 8578 transitions. [2021-08-12 16:07:55,470 INFO L78 Accepts]: Start accepts. Automaton has 3063 states and 8578 transitions. Word has length 105 [2021-08-12 16:07:55,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:07:55,471 INFO L482 AbstractCegarLoop]: Abstraction has 3063 states and 8578 transitions. [2021-08-12 16:07:55,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:07:55,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3063 states and 8578 transitions. [2021-08-12 16:07:55,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:07:55,473 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:07:55,473 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:07:55,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-12 16:07:55,674 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:07:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:07:55,674 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-08-12 16:07:55,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:07:55,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539540141] [2021-08-12 16:07:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:07:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:07:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:55,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:07:55,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539540141] [2021-08-12 16:07:55,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539540141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:55,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780383906] [2021-08-12 16:07:55,803 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:07:55,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-12 16:07:55,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:07:55,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:07:55,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:07:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:07:55,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780383906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:07:55,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:07:55,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:07:55,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147199606] [2021-08-12 16:07:55,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:07:55,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:07:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:07:55,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:07:55,991 INFO L87 Difference]: Start difference. First operand 3063 states and 8578 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:01,263 INFO L93 Difference]: Finished difference Result 4159 states and 11229 transitions. [2021-08-12 16:08:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 16:08:01,264 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:01,282 INFO L225 Difference]: With dead ends: 4159 [2021-08-12 16:08:01,283 INFO L226 Difference]: Without dead ends: 3761 [2021-08-12 16:08:01,283 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 448.0ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-08-12 16:08:01,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-08-12 16:08:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3138. [2021-08-12 16:08:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 2.8061842524705134) internal successors, (8803), 3137 states have internal predecessors, (8803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:01,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 8803 transitions. [2021-08-12 16:08:01,947 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 8803 transitions. Word has length 105 [2021-08-12 16:08:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:01,947 INFO L482 AbstractCegarLoop]: Abstraction has 3138 states and 8803 transitions. [2021-08-12 16:08:01,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:01,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 8803 transitions. [2021-08-12 16:08:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:01,950 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:01,950 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:02,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:02,151 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:02,152 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-08-12 16:08:02,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:02,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057303854] [2021-08-12 16:08:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:02,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:02,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057303854] [2021-08-12 16:08:02,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057303854] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:02,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903917058] [2021-08-12 16:08:02,283 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:02,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:08:02,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:08:02,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:02,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903917058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:02,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:02,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:08:02,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925754056] [2021-08-12 16:08:02,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:02,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:02,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:02,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:02,478 INFO L87 Difference]: Start difference. First operand 3138 states and 8803 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:07,715 INFO L93 Difference]: Finished difference Result 4244 states and 11519 transitions. [2021-08-12 16:08:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 16:08:07,715 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:07,735 INFO L225 Difference]: With dead ends: 4244 [2021-08-12 16:08:07,736 INFO L226 Difference]: Without dead ends: 3846 [2021-08-12 16:08:07,736 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 566.4ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 16:08:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3846 states. [2021-08-12 16:08:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3846 to 3213. [2021-08-12 16:08:08,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 3212 states have (on average 2.816936488169365) internal successors, (9048), 3212 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 9048 transitions. [2021-08-12 16:08:08,440 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 9048 transitions. Word has length 105 [2021-08-12 16:08:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:08,440 INFO L482 AbstractCegarLoop]: Abstraction has 3213 states and 9048 transitions. [2021-08-12 16:08:08,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 9048 transitions. [2021-08-12 16:08:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:08,443 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:08,443 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:08,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:08,643 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:08,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:08,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-08-12 16:08:08,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:08,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740547875] [2021-08-12 16:08:08,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:08,768 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:08,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:08,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740547875] [2021-08-12 16:08:08,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740547875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:08,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109092768] [2021-08-12 16:08:08,769 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:08,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-12 16:08:08,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:08:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:08,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109092768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:08,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:08,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-08-12 16:08:08,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021430582] [2021-08-12 16:08:08,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-08-12 16:08:08,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-12 16:08:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-08-12 16:08:08,951 INFO L87 Difference]: Start difference. First operand 3213 states and 9048 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:13,806 INFO L93 Difference]: Finished difference Result 4986 states and 13643 transitions. [2021-08-12 16:08:13,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 16:08:13,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:13,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:13,826 INFO L225 Difference]: With dead ends: 4986 [2021-08-12 16:08:13,827 INFO L226 Difference]: Without dead ends: 4588 [2021-08-12 16:08:13,828 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 472.9ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-08-12 16:08:13,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4588 states. [2021-08-12 16:08:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4588 to 3393. [2021-08-12 16:08:14,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 3392 states have (on average 2.832252358490566) internal successors, (9607), 3392 states have internal predecessors, (9607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:14,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 9607 transitions. [2021-08-12 16:08:14,485 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 9607 transitions. Word has length 105 [2021-08-12 16:08:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:14,485 INFO L482 AbstractCegarLoop]: Abstraction has 3393 states and 9607 transitions. [2021-08-12 16:08:14,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:14,486 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 9607 transitions. [2021-08-12 16:08:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-12 16:08:14,488 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:14,488 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:14,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:14,689 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-08-12 16:08:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:14,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901099722] [2021-08-12 16:08:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:14,836 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:14,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:14,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901099722] [2021-08-12 16:08:14,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901099722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:14,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438778418] [2021-08-12 16:08:14,836 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:14,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-12 16:08:14,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:14,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-12 16:08:14,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:15,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438778418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:15,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:15,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-08-12 16:08:15,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78192188] [2021-08-12 16:08:15,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:15,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:15,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:15,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:15,047 INFO L87 Difference]: Start difference. First operand 3393 states and 9607 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:20,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:20,106 INFO L93 Difference]: Finished difference Result 4854 states and 13436 transitions. [2021-08-12 16:08:20,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-12 16:08:20,106 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-12 16:08:20,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:20,125 INFO L225 Difference]: With dead ends: 4854 [2021-08-12 16:08:20,126 INFO L226 Difference]: Without dead ends: 4151 [2021-08-12 16:08:20,129 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 651.3ms TimeCoverageRelationStatistics Valid=896, Invalid=2526, Unknown=0, NotChecked=0, Total=3422 [2021-08-12 16:08:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-08-12 16:08:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3428. [2021-08-12 16:08:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.825503355704698) internal successors, (9683), 3427 states have internal predecessors, (9683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:20,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9683 transitions. [2021-08-12 16:08:20,824 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9683 transitions. Word has length 105 [2021-08-12 16:08:20,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:20,824 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9683 transitions. [2021-08-12 16:08:20,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9683 transitions. [2021-08-12 16:08:20,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:20,827 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:20,827 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:21,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-12 16:08:21,028 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:21,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-08-12 16:08:21,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:21,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666247160] [2021-08-12 16:08:21,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:21,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:21,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666247160] [2021-08-12 16:08:21,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666247160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:21,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13266587] [2021-08-12 16:08:21,205 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:21,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:08:21,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:21,438 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:21,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13266587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:21,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:21,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-08-12 16:08:21,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122624178] [2021-08-12 16:08:21,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-08-12 16:08:21,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:21,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-12 16:08:21,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-08-12 16:08:21,439 INFO L87 Difference]: Start difference. First operand 3428 states and 9683 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:25,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:25,781 INFO L93 Difference]: Finished difference Result 4596 states and 12659 transitions. [2021-08-12 16:08:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:08:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:08:25,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:25,802 INFO L225 Difference]: With dead ends: 4596 [2021-08-12 16:08:25,802 INFO L226 Difference]: Without dead ends: 4134 [2021-08-12 16:08:25,803 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 440.2ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:08:25,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4134 states. [2021-08-12 16:08:26,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4134 to 3513. [2021-08-12 16:08:26,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.805523917995444) internal successors, (9853), 3512 states have internal predecessors, (9853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9853 transitions. [2021-08-12 16:08:26,623 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9853 transitions. Word has length 110 [2021-08-12 16:08:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:26,624 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9853 transitions. [2021-08-12 16:08:26,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:26,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9853 transitions. [2021-08-12 16:08:26,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:26,627 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:26,627 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:26,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-12 16:08:26,827 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:26,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-08-12 16:08:26,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:26,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570164497] [2021-08-12 16:08:26,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:26,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570164497] [2021-08-12 16:08:26,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570164497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:26,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103844163] [2021-08-12 16:08:26,997 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:27,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:08:27,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:08:27,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:27,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103844163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:27,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:27,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:08:27,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131920757] [2021-08-12 16:08:27,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:27,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:27,204 INFO L87 Difference]: Start difference. First operand 3513 states and 9853 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:36,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:36,560 INFO L93 Difference]: Finished difference Result 5189 states and 13589 transitions. [2021-08-12 16:08:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-12 16:08:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:08:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:36,583 INFO L225 Difference]: With dead ends: 5189 [2021-08-12 16:08:36,583 INFO L226 Difference]: Without dead ends: 4791 [2021-08-12 16:08:36,584 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 355.9ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-08-12 16:08:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4791 states. [2021-08-12 16:08:37,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4791 to 3528. [2021-08-12 16:08:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:08:37,459 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:08:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:37,459 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:08:37,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:08:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:37,462 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:37,462 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:37,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-12 16:08:37,663 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:37,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:37,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-08-12 16:08:37,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:37,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876649880] [2021-08-12 16:08:37,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:37,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:37,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876649880] [2021-08-12 16:08:37,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876649880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:37,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728281987] [2021-08-12 16:08:37,862 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:37,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 16:08:37,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:37,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:08:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:38,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728281987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:38,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:38,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:08:38,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274176326] [2021-08-12 16:08:38,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:08:38,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:08:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:08:38,091 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:47,709 INFO L93 Difference]: Finished difference Result 5074 states and 13359 transitions. [2021-08-12 16:08:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:08:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:08:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:47,730 INFO L225 Difference]: With dead ends: 5074 [2021-08-12 16:08:47,730 INFO L226 Difference]: Without dead ends: 4676 [2021-08-12 16:08:47,731 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 446.7ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:08:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4676 states. [2021-08-12 16:08:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4676 to 3528. [2021-08-12 16:08:48,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:08:48,668 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:08:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:48,668 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:08:48,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:48,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:08:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:48,671 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:48,671 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:08:48,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-12 16:08:48,872 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:08:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:08:48,872 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-08-12 16:08:48,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:08:48,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174099926] [2021-08-12 16:08:48,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:08:48,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:08:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:49,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:08:49,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174099926] [2021-08-12 16:08:49,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174099926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:49,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966991611] [2021-08-12 16:08:49,034 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:08:49,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:08:49,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:08:49,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:08:49,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:08:49,239 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:08:49,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966991611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:08:49,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:08:49,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:08:49,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502703462] [2021-08-12 16:08:49,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:08:49,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:08:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:08:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:08:49,240 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:08:58,924 INFO L93 Difference]: Finished difference Result 5049 states and 13309 transitions. [2021-08-12 16:08:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-12 16:08:58,924 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:08:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:08:58,948 INFO L225 Difference]: With dead ends: 5049 [2021-08-12 16:08:58,948 INFO L226 Difference]: Without dead ends: 4651 [2021-08-12 16:08:58,949 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-08-12 16:08:58,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2021-08-12 16:08:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 3528. [2021-08-12 16:08:59,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:08:59,874 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:08:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:08:59,874 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:08:59,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:08:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:08:59,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:08:59,878 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:08:59,878 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:00,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-12 16:09:00,079 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:00,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-08-12 16:09:00,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:00,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363256712] [2021-08-12 16:09:00,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:00,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363256712] [2021-08-12 16:09:00,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363256712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:00,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088885383] [2021-08-12 16:09:00,260 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:00,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 16:09:00,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:00,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:00,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088885383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:00,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:00,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:09:00,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436080612] [2021-08-12 16:09:00,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:09:00,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:00,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:09:00,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:09:00,482 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:10,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:10,155 INFO L93 Difference]: Finished difference Result 4999 states and 13209 transitions. [2021-08-12 16:09:10,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:09:10,155 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:10,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:10,179 INFO L225 Difference]: With dead ends: 4999 [2021-08-12 16:09:10,179 INFO L226 Difference]: Without dead ends: 4601 [2021-08-12 16:09:10,180 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:09:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-08-12 16:09:11,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3528. [2021-08-12 16:09:11,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:11,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:09:11,155 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:09:11,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:11,155 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:09:11,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:11,156 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:09:11,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:11,159 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:11,159 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:11,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:11,361 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-08-12 16:09:11,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:11,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961435929] [2021-08-12 16:09:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:11,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961435929] [2021-08-12 16:09:11,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961435929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:11,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001555959] [2021-08-12 16:09:11,520 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:11,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 16:09:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:11,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:11,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:11,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001555959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:11,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:11,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:09:11,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098805403] [2021-08-12 16:09:11,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:09:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:11,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:09:11,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:09:11,727 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:21,116 INFO L93 Difference]: Finished difference Result 4949 states and 13109 transitions. [2021-08-12 16:09:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-12 16:09:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:21,139 INFO L225 Difference]: With dead ends: 4949 [2021-08-12 16:09:21,139 INFO L226 Difference]: Without dead ends: 4551 [2021-08-12 16:09:21,140 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-08-12 16:09:21,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-08-12 16:09:22,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3528. [2021-08-12 16:09:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:09:22,112 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:09:22,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:22,112 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:09:22,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:22,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:09:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:22,116 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:22,116 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:22,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-12 16:09:22,316 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-08-12 16:09:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:22,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916943300] [2021-08-12 16:09:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:22,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:22,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916943300] [2021-08-12 16:09:22,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916943300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:22,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767751557] [2021-08-12 16:09:22,476 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:22,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:22,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:22,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:22,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767751557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:22,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:22,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:09:22,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694156541] [2021-08-12 16:09:22,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:09:22,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:22,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:09:22,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:09:22,687 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:31,954 INFO L93 Difference]: Finished difference Result 4899 states and 13009 transitions. [2021-08-12 16:09:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-12 16:09:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:31,975 INFO L225 Difference]: With dead ends: 4899 [2021-08-12 16:09:31,976 INFO L226 Difference]: Without dead ends: 4501 [2021-08-12 16:09:31,977 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:09:31,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4501 states. [2021-08-12 16:09:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4501 to 3528. [2021-08-12 16:09:32,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:09:32,959 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:09:32,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:32,959 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:09:32,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:32,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:09:32,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:32,962 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:32,963 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:33,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-08-12 16:09:33,163 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:33,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:33,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-08-12 16:09:33,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:33,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158991654] [2021-08-12 16:09:33,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:33,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:33,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158991654] [2021-08-12 16:09:33,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158991654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:33,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670416083] [2021-08-12 16:09:33,319 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:33,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:09:33,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:33,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:33,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:33,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670416083] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:33,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:33,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:09:33,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402001450] [2021-08-12 16:09:33,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:09:33,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:33,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:09:33,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:09:33,520 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:42,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:42,379 INFO L93 Difference]: Finished difference Result 4849 states and 12909 transitions. [2021-08-12 16:09:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-12 16:09:42,379 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:42,400 INFO L225 Difference]: With dead ends: 4849 [2021-08-12 16:09:42,401 INFO L226 Difference]: Without dead ends: 4451 [2021-08-12 16:09:42,401 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:09:42,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-08-12 16:09:43,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3528. [2021-08-12 16:09:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:43,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:09:43,392 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:09:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:43,393 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:09:43,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:09:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:43,396 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:43,396 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:43,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:43,601 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:43,601 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-08-12 16:09:43,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:43,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848713612] [2021-08-12 16:09:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:43,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:43,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848713612] [2021-08-12 16:09:43,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848713612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:43,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272178239] [2021-08-12 16:09:43,756 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:43,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 16:09:43,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:43,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:43,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:43,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272178239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:43,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:43,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:09:43,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097226143] [2021-08-12 16:09:43,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:09:43,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:43,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:09:43,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:09:43,979 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:09:52,686 INFO L93 Difference]: Finished difference Result 4799 states and 12809 transitions. [2021-08-12 16:09:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-12 16:09:52,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:09:52,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:09:52,707 INFO L225 Difference]: With dead ends: 4799 [2021-08-12 16:09:52,707 INFO L226 Difference]: Without dead ends: 4401 [2021-08-12 16:09:52,708 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 529.0ms TimeCoverageRelationStatistics Valid=603, Invalid=1947, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 16:09:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-08-12 16:09:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3528. [2021-08-12 16:09:53,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:09:53,715 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:09:53,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:09:53,715 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:09:53,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:09:53,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:09:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:09:53,718 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:09:53,718 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:09:53,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:53,919 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:09:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:09:53,919 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-08-12 16:09:53,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:09:53,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317178371] [2021-08-12 16:09:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:09:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:09:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:54,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:09:54,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317178371] [2021-08-12 16:09:54,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317178371] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:54,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216198014] [2021-08-12 16:09:54,065 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:09:54,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:09:54,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:09:54,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:09:54,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:09:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:09:54,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216198014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:09:54,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:09:54,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:09:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469688438] [2021-08-12 16:09:54,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:09:54,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:09:54,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:09:54,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:09:54,267 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:02,554 INFO L93 Difference]: Finished difference Result 4749 states and 12709 transitions. [2021-08-12 16:10:02,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-12 16:10:02,555 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:02,580 INFO L225 Difference]: With dead ends: 4749 [2021-08-12 16:10:02,580 INFO L226 Difference]: Without dead ends: 4351 [2021-08-12 16:10:02,581 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 440.0ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-08-12 16:10:02,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-08-12 16:10:03,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3528. [2021-08-12 16:10:03,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:10:03,585 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:10:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:03,585 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:10:03,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:10:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:03,588 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:03,588 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:03,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:03,791 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-08-12 16:10:03,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:03,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348566168] [2021-08-12 16:10:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:03,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:03,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348566168] [2021-08-12 16:10:03,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348566168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:03,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104223297] [2021-08-12 16:10:03,940 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:04,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 16:10:04,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:04,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:04,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:04,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104223297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:04,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:04,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:10:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373451446] [2021-08-12 16:10:04,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:10:04,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:10:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:10:04,158 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:12,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:12,353 INFO L93 Difference]: Finished difference Result 4699 states and 12609 transitions. [2021-08-12 16:10:12,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-12 16:10:12,353 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:12,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:12,378 INFO L225 Difference]: With dead ends: 4699 [2021-08-12 16:10:12,378 INFO L226 Difference]: Without dead ends: 4301 [2021-08-12 16:10:12,379 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 16:10:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-08-12 16:10:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3528. [2021-08-12 16:10:13,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:10:13,393 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:10:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:13,393 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:10:13,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:10:13,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:13,397 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:13,397 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:13,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-12 16:10:13,597 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-08-12 16:10:13,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:13,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394183525] [2021-08-12 16:10:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:13,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:13,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394183525] [2021-08-12 16:10:13,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394183525] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:13,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406648983] [2021-08-12 16:10:13,745 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:13,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 16:10:13,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:13,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:13,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:13,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406648983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:13,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:13,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:10:13,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648655235] [2021-08-12 16:10:13,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:10:13,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:13,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:10:13,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:10:13,947 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:21,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:21,948 INFO L93 Difference]: Finished difference Result 4649 states and 12509 transitions. [2021-08-12 16:10:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-12 16:10:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:21,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:21,974 INFO L225 Difference]: With dead ends: 4649 [2021-08-12 16:10:21,974 INFO L226 Difference]: Without dead ends: 4251 [2021-08-12 16:10:21,975 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-08-12 16:10:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-08-12 16:10:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3528. [2021-08-12 16:10:22,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:22,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:10:22,993 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:10:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:22,993 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:10:22,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:10:22,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:22,996 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:22,997 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:23,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-12 16:10:23,197 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-08-12 16:10:23,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:23,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354524244] [2021-08-12 16:10:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:23,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354524244] [2021-08-12 16:10:23,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354524244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:23,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685866579] [2021-08-12 16:10:23,343 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:23,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:23,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:23,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685866579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:23,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:23,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:10:23,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404740354] [2021-08-12 16:10:23,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:10:23,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:23,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:10:23,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:10:23,551 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:31,480 INFO L93 Difference]: Finished difference Result 4599 states and 12409 transitions. [2021-08-12 16:10:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-12 16:10:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:31,508 INFO L225 Difference]: With dead ends: 4599 [2021-08-12 16:10:31,508 INFO L226 Difference]: Without dead ends: 4201 [2021-08-12 16:10:31,509 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 610.4ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 16:10:31,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-08-12 16:10:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3528. [2021-08-12 16:10:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:10:32,545 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:10:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:32,545 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:10:32,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:10:32,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:32,549 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:32,549 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:32,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:32,750 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:32,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:32,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-08-12 16:10:32,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:32,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405240212] [2021-08-12 16:10:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:32,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:32,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405240212] [2021-08-12 16:10:32,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405240212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:32,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013880446] [2021-08-12 16:10:32,931 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:32,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:10:32,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:33,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013880446] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:33,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:33,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:10:33,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84302082] [2021-08-12 16:10:33,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:10:33,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:33,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:10:33,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:10:33,154 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:40,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:40,875 INFO L93 Difference]: Finished difference Result 4549 states and 12309 transitions. [2021-08-12 16:10:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-12 16:10:40,875 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:40,901 INFO L225 Difference]: With dead ends: 4549 [2021-08-12 16:10:40,902 INFO L226 Difference]: Without dead ends: 4151 [2021-08-12 16:10:40,903 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 556.0ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-08-12 16:10:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-08-12 16:10:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3528. [2021-08-12 16:10:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8020981003685854) internal successors, (9883), 3527 states have internal predecessors, (9883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:41,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9883 transitions. [2021-08-12 16:10:41,949 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9883 transitions. Word has length 110 [2021-08-12 16:10:41,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:41,950 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9883 transitions. [2021-08-12 16:10:41,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9883 transitions. [2021-08-12 16:10:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:41,953 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:41,953 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:42,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-12 16:10:42,154 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:42,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:42,154 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-08-12 16:10:42,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:42,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095642429] [2021-08-12 16:10:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:42,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:42,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:42,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095642429] [2021-08-12 16:10:42,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095642429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:42,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281303855] [2021-08-12 16:10:42,299 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:42,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-12 16:10:42,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:42,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281303855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:42,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:42,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:10:42,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243781987] [2021-08-12 16:10:42,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:10:42,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:42,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:10:42,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:10:42,516 INFO L87 Difference]: Start difference. First operand 3528 states and 9883 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:50,207 INFO L93 Difference]: Finished difference Result 4559 states and 12359 transitions. [2021-08-12 16:10:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-12 16:10:50,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:50,246 INFO L225 Difference]: With dead ends: 4559 [2021-08-12 16:10:50,246 INFO L226 Difference]: Without dead ends: 4161 [2021-08-12 16:10:50,247 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 698.8ms TimeCoverageRelationStatistics Valid=843, Invalid=2349, Unknown=0, NotChecked=0, Total=3192 [2021-08-12 16:10:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4161 states. [2021-08-12 16:10:51,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4161 to 3528. [2021-08-12 16:10:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-08-12 16:10:51,305 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-08-12 16:10:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:10:51,305 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-08-12 16:10:51,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-08-12 16:10:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:10:51,309 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:10:51,309 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:10:51,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-08-12 16:10:51,510 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:10:51,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:10:51,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-08-12 16:10:51,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:10:51,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199549596] [2021-08-12 16:10:51,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:10:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:10:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:51,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:10:51,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199549596] [2021-08-12 16:10:51,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199549596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:51,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341470772] [2021-08-12 16:10:51,672 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:10:51,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-12 16:10:51,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:10:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:10:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:10:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:10:51,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341470772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:10:51,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:10:51,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-08-12 16:10:51,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789181606] [2021-08-12 16:10:51,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:10:51,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:10:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:10:51,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:10:51,867 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:10:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:10:59,072 INFO L93 Difference]: Finished difference Result 5326 states and 14533 transitions. [2021-08-12 16:10:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-12 16:10:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:10:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:10:59,099 INFO L225 Difference]: With dead ends: 5326 [2021-08-12 16:10:59,100 INFO L226 Difference]: Without dead ends: 4928 [2021-08-12 16:10:59,101 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 542.3ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-08-12 16:10:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-08-12 16:11:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-08-12 16:11:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-08-12 16:11:00,134 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-08-12 16:11:00,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:00,134 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-08-12 16:11:00,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:00,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-08-12 16:11:00,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-08-12 16:11:00,138 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:00,138 INFO L550 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:00,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-08-12 16:11:00,338 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:00,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:00,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-08-12 16:11:00,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:00,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15796974] [2021-08-12 16:11:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:00,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:00,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15796974] [2021-08-12 16:11:00,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15796974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:00,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125762292] [2021-08-12 16:11:00,513 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:00,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-12 16:11:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:00,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-12 16:11:00,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:00,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125762292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:00,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:00,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-08-12 16:11:00,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8551403] [2021-08-12 16:11:00,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:11:00,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:00,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:11:00,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:11:00,758 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:08,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:08,511 INFO L93 Difference]: Finished difference Result 5149 states and 14161 transitions. [2021-08-12 16:11:08,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-12 16:11:08,511 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-08-12 16:11:08,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:08,537 INFO L225 Difference]: With dead ends: 5149 [2021-08-12 16:11:08,537 INFO L226 Difference]: Without dead ends: 4446 [2021-08-12 16:11:08,539 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 779.1ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-08-12 16:11:08,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-08-12 16:11:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-08-12 16:11:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:09,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-08-12 16:11:09,508 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-08-12 16:11:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:09,509 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-08-12 16:11:09,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-08-12 16:11:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:11:09,511 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:09,511 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:09,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:09,712 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-08-12 16:11:09,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:09,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923515102] [2021-08-12 16:11:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:09,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:09,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923515102] [2021-08-12 16:11:09,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923515102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:09,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100922950] [2021-08-12 16:11:09,901 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:09,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-12 16:11:09,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:11:09,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:10,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100922950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:10,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:10,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-12 16:11:10,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103071869] [2021-08-12 16:11:10,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:11:10,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:11:10,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:11:10,108 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:19,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:19,629 INFO L93 Difference]: Finished difference Result 3949 states and 10269 transitions. [2021-08-12 16:11:19,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-12 16:11:19,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-12 16:11:19,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:19,655 INFO L225 Difference]: With dead ends: 3949 [2021-08-12 16:11:19,655 INFO L226 Difference]: Without dead ends: 3551 [2021-08-12 16:11:19,656 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=479, Invalid=1413, Unknown=0, NotChecked=0, Total=1892 [2021-08-12 16:11:19,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-08-12 16:11:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-08-12 16:11:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:20,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-08-12 16:11:20,776 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-08-12 16:11:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:20,776 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-08-12 16:11:20,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-08-12 16:11:20,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:11:20,779 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:20,779 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:20,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:20,979 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:20,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:20,980 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-08-12 16:11:20,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:20,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191650222] [2021-08-12 16:11:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:21,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:21,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191650222] [2021-08-12 16:11:21,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191650222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:21,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439317653] [2021-08-12 16:11:21,171 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:21,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:21,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:11:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:21,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439317653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:21,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:21,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-08-12 16:11:21,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655247183] [2021-08-12 16:11:21,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-08-12 16:11:21,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:21,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-12 16:11:21,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-08-12 16:11:21,387 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:34,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-12 16:11:34,653 INFO L93 Difference]: Finished difference Result 4369 states and 11184 transitions. [2021-08-12 16:11:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-12 16:11:34,653 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-12 16:11:34,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-12 16:11:34,681 INFO L225 Difference]: With dead ends: 4369 [2021-08-12 16:11:34,681 INFO L226 Difference]: Without dead ends: 3971 [2021-08-12 16:11:34,682 INFO L806 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 456.5ms TimeCoverageRelationStatistics Valid=529, Invalid=1633, Unknown=0, NotChecked=0, Total=2162 [2021-08-12 16:11:34,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-08-12 16:11:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-08-12 16:11:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-08-12 16:11:35,826 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-08-12 16:11:35,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-12 16:11:35,826 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-08-12 16:11:35,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-12 16:11:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-08-12 16:11:35,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-12 16:11:35,829 INFO L542 BasicCegarLoop]: Found error trace [2021-08-12 16:11:35,829 INFO L550 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-12 16:11:36,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:36,029 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-08-12 16:11:36,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-12 16:11:36,030 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-08-12 16:11:36,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-12 16:11:36,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213470424] [2021-08-12 16:11:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-12 16:11:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-12 16:11:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:36,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-12 16:11:36,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213470424] [2021-08-12 16:11:36,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213470424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:36,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550363159] [2021-08-12 16:11:36,235 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-12 16:11:36,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-12 16:11:36,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-12 16:11:36,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-12 16:11:36,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-12 16:11:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-12 16:11:36,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550363159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-12 16:11:36,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-12 16:11:36,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-12 16:11:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636389177] [2021-08-12 16:11:36,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-08-12 16:11:36,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-12 16:11:36,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-12 16:11:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-12 16:11:36,432 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 22 states, 22 states have (on average 5.2272727272727275) internal successors, (115), 22 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-12 16:11:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-12 16:11:39,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-08-12 16:11:39,725 WARN L547 AbstractCegarLoop]: Verification canceled [2021-08-12 16:11:39,727 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-12 16:11:39,729 WARN L188 ceAbstractionStarter]: Timeout [2021-08-12 16:11:39,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.08 04:11:39 BasicIcfg [2021-08-12 16:11:39,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-12 16:11:39,729 INFO L168 Benchmark]: Toolchain (without parser) took 557984.52 ms. Allocated memory was 183.5 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 147.4 MB in the beginning and 675.5 MB in the end (delta: -528.1 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-12 16:11:39,729 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory is still 165.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-12 16:11:39,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 487.38 ms. Allocated memory is still 183.5 MB. Free memory was 147.1 MB in the beginning and 146.9 MB in the end (delta: 213.4 kB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:39,730 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.44 ms. Allocated memory is still 183.5 MB. Free memory was 146.9 MB in the beginning and 144.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:39,730 INFO L168 Benchmark]: Boogie Preprocessor took 31.30 ms. Allocated memory is still 183.5 MB. Free memory was 144.9 MB in the beginning and 143.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:39,730 INFO L168 Benchmark]: RCFGBuilder took 365.96 ms. Allocated memory is still 183.5 MB. Free memory was 143.9 MB in the beginning and 122.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-08-12 16:11:39,730 INFO L168 Benchmark]: TraceAbstraction took 557042.36 ms. Allocated memory was 183.5 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 122.4 MB in the beginning and 675.5 MB in the end (delta: -553.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-12 16:11:39,730 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 183.5 MB. Free memory is still 165.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 487.38 ms. Allocated memory is still 183.5 MB. Free memory was 147.1 MB in the beginning and 146.9 MB in the end (delta: 213.4 kB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 52.44 ms. Allocated memory is still 183.5 MB. Free memory was 146.9 MB in the beginning and 144.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.30 ms. Allocated memory is still 183.5 MB. Free memory was 144.9 MB in the beginning and 143.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 365.96 ms. Allocated memory is still 183.5 MB. Free memory was 143.9 MB in the beginning and 122.9 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 557042.36 ms. Allocated memory was 183.5 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 122.4 MB in the beginning and 675.5 MB in the end (delta: -553.2 MB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 722]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing difference of abstraction (2753states) and FLOYD_HOARE automaton (currently 19 states, 22 states before enhancement),while ReachableStatesComputation was computing reachable states (1223 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 556958.6ms, OverallIterations: 143, TraceHistogramMax: 9, EmptinessCheckTime: 339.1ms, AutomataDifference: 433015.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 129.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 13591 SDtfs, 86640 SDslu, 106096 SDs, 0 SdLazy, 19147 SolverSat, 11932 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11046.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16910 GetRequests, 11848 SyntacticMatches, 0 SemanticMatches, 5062 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44630 ImplicationChecksByTransitivity, 48642.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3708occurred in iteration=139, InterpolantAutomatonStates: 3847, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49093.9ms AutomataMinimizationTime, 142 MinimizatonAttempts, 102558 StatesRemovedByMinimization, 142 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1491.4ms SsaConstructionTime, 3582.1ms SatisfiabilityAnalysisTime, 34429.7ms InterpolantComputationTime, 23968 NumberOfCodeBlocks, 23968 NumberOfCodeBlocksAsserted, 693 NumberOfCheckSat, 23688 ConstructedInterpolants, 0 QuantifiedInterpolants, 96222 SizeOfPredicates, 1696 NumberOfNonLiveVariables, 25568 ConjunctsInSsa, 2381 ConjunctsInUnsatCore, 280 InterpolantComputations, 6 PerfectInterpolantSequences, 1/33462 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown