/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/stack_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 18:22:24,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 18:22:24,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 18:22:24,292 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-13 18:22:24,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-13 18:22:24,295 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-13 18:22:24,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-13 18:22:24,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-13 18:22:24,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-13 18:22:24,305 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-13 18:22:24,306 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-13 18:22:24,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-13 18:22:24,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-13 18:22:24,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-13 18:22:24,309 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-13 18:22:24,310 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-13 18:22:24,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-13 18:22:24,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-13 18:22:24,316 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-13 18:22:24,320 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-13 18:22:24,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-13 18:22:24,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-13 18:22:24,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-13 18:22:24,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-13 18:22:24,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-07-13 18:22:24,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-13 18:22:24,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-13 18:22:24,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-13 18:22:24,337 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 [2021-07-13 18:22:24,358 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 18:22:24,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 18:22:24,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 18:22:24,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 18:22:24,360 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 18:22:24,360 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 18:22:24,360 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 18:22:24,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 18:22:24,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 18:22:24,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 18:22:24,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 18:22:24,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 18:22:24,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 18:22:24,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 18:22:24,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 18:22:24,361 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 18:22:24,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 18:22:24,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 18:22:24,362 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 18:22:24,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 18:22:24,363 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 18:22:24,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 18:22:24,363 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 18:22:24,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 18:22:24,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 18:22:24,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 18:22:24,627 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-13 18:22:24,627 INFO L275 PluginConnector]: CDTParser initialized [2021-07-13 18:22:24,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-1.i [2021-07-13 18:22:24,666 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd37b783/9425020d212044d2ac7a662dc41e34f6/FLAG18ddb1140 [2021-07-13 18:22:25,104 INFO L306 CDTParser]: Found 1 translation units. [2021-07-13 18:22:25,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-1.i [2021-07-13 18:22:25,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd37b783/9425020d212044d2ac7a662dc41e34f6/FLAG18ddb1140 [2021-07-13 18:22:25,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd37b783/9425020d212044d2ac7a662dc41e34f6 [2021-07-13 18:22:25,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 18:22:25,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-07-13 18:22:25,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-13 18:22:25,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-13 18:22:25,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-13 18:22:25,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,500 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dff9a3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25, skipping insertion in model container [2021-07-13 18:22:25,500 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-13 18:22:25,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-13 18:22:25,857 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/stack_longest-1.i[41530,41543] [2021-07-13 18:22:25,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:22:25,875 INFO L203 MainTranslator]: Completed pre-run [2021-07-13 18:22:25,894 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/stack_longest-1.i[41530,41543] [2021-07-13 18:22:25,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-13 18:22:25,938 INFO L208 MainTranslator]: Completed translation [2021-07-13 18:22:25,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25 WrapperNode [2021-07-13 18:22:25,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-13 18:22:25,939 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 18:22:25,939 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 18:22:25,939 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 18:22:25,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 18:22:25,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 18:22:25,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 18:22:25,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 18:22:25,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (1/1) ... [2021-07-13 18:22:25,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 18:22:25,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 18:22:25,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 18:22:25,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 18:22:25,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (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 [2021-07-13 18:22:26,032 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-07-13 18:22:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-07-13 18:22:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-13 18:22:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 18:22:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 18:22:26,034 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 18:22:26,348 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 18:22:26,349 INFO L299 CfgBuilder]: Removed 26 assume(true) statements. [2021-07-13 18:22:26,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:22:26 BoogieIcfgContainer [2021-07-13 18:22:26,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 18:22:26,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 18:22:26,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 18:22:26,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 18:22:26,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 06:22:25" (1/3) ... [2021-07-13 18:22:26,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c3a604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:22:26, skipping insertion in model container [2021-07-13 18:22:26,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 06:22:25" (2/3) ... [2021-07-13 18:22:26,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c3a604 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 06:22:26, skipping insertion in model container [2021-07-13 18:22:26,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 06:22:26" (3/3) ... [2021-07-13 18:22:26,354 INFO L111 eAbstractionObserver]: Analyzing ICFG stack_longest-1.i [2021-07-13 18:22:26,357 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 18:22:26,357 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 18:22:26,358 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-07-13 18:22:26,358 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 18:22:26,382 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,382 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,382 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,382 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,383 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,384 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,385 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,386 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,387 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,388 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,389 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,390 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,391 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,391 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,391 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,391 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,392 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,392 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,392 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,393 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,394 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,400 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,401 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,402 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,403 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,404 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,405 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,406 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,407 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,407 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,408 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,409 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,410 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,411 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,412 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,416 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,416 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,416 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,416 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,416 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,417 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,419 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,419 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,419 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,419 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,420 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,421 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,422 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,423 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,424 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,424 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,424 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret39| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~ret42| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_dec_top_#t~post34| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~nondet49| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~mem43| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,426 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_pop_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#t~nondet40| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~ret50| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post48| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_pop_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,427 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,427 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,431 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~x| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,431 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_get_top_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~ret47| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~nondet36| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#res| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~stack.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#t~ret38| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post44| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~tmp~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_inc_top_#t~post33| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,432 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,433 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_push_~x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,433 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,433 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet45| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,433 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~nondet46| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,433 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_push_#in~stack.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,433 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-07-13 18:22:26,443 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-07-13 18:22:26,458 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:22:26,475 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:22:26,475 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:22:26,475 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:22:26,476 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:22:26,476 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:22:26,476 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:22:26,476 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:22:26,476 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t1Thread1of1ForFork1======== [2021-07-13 18:22:26,485 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-13 18:22:26,766 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-07-13 18:22:26,828 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:26,829 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:26,829 INFO L430 AbstractCegarLoop]: === Iteration 1 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -58151633, now seen corresponding path program 1 times [2021-07-13 18:22:26,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:26,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200633632] [2021-07-13 18:22:26,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:26,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:27,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:27,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200633632] [2021-07-13 18:22:27,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200633632] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:22:27,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:22:27,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:22:27,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151888982] [2021-07-13 18:22:27,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:22:27,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:27,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:22:27,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:22:27,101 INFO L87 Difference]: Start difference. First operand has 9090 states, 9088 states have (on average 2.8570642605633805) internal successors, (25965), 9089 states have internal predecessors, (25965), 0 states have call successors, (0), 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 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:27,271 INFO L93 Difference]: Finished difference Result 13194 states and 36538 transitions. [2021-07-13 18:22:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:22:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-07-13 18:22:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:27,345 INFO L225 Difference]: With dead ends: 13194 [2021-07-13 18:22:27,346 INFO L226 Difference]: Without dead ends: 12844 [2021-07-13 18:22:27,346 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:22:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12844 states. [2021-07-13 18:22:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12844 to 11431. [2021-07-13 18:22:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11431 states, 11429 states have (on average 2.7715460670224865) internal successors, (31676), 11430 states have internal predecessors, (31676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11431 states to 11431 states and 31676 transitions. [2021-07-13 18:22:27,785 INFO L78 Accepts]: Start accepts. Automaton has 11431 states and 31676 transitions. Word has length 54 [2021-07-13 18:22:27,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:27,786 INFO L482 AbstractCegarLoop]: Abstraction has 11431 states and 31676 transitions. [2021-07-13 18:22:27,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:27,787 INFO L276 IsEmpty]: Start isEmpty. Operand 11431 states and 31676 transitions. [2021-07-13 18:22:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-07-13 18:22:27,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:27,796 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:27,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 18:22:27,796 INFO L430 AbstractCegarLoop]: === Iteration 2 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:27,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:27,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1737064523, now seen corresponding path program 1 times [2021-07-13 18:22:27,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:27,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855025064] [2021-07-13 18:22:27,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:27,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:27,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:27,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855025064] [2021-07-13 18:22:27,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855025064] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:22:27,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:22:27,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 18:22:27,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603694578] [2021-07-13 18:22:27,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-13 18:22:27,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:27,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-13 18:22:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-13 18:22:27,900 INFO L87 Difference]: Start difference. First operand 11431 states and 31676 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:28,072 INFO L93 Difference]: Finished difference Result 15291 states and 42316 transitions. [2021-07-13 18:22:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 18:22:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-07-13 18:22:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:28,130 INFO L225 Difference]: With dead ends: 15291 [2021-07-13 18:22:28,132 INFO L226 Difference]: Without dead ends: 15291 [2021-07-13 18:22:28,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-13 18:22:28,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15291 states. [2021-07-13 18:22:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15291 to 12010. [2021-07-13 18:22:28,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12010 states, 12008 states have (on average 2.770819453697535) internal successors, (33272), 12009 states have internal predecessors, (33272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:28,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12010 states to 12010 states and 33272 transitions. [2021-07-13 18:22:28,488 INFO L78 Accepts]: Start accepts. Automaton has 12010 states and 33272 transitions. Word has length 63 [2021-07-13 18:22:28,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:28,489 INFO L482 AbstractCegarLoop]: Abstraction has 12010 states and 33272 transitions. [2021-07-13 18:22:28,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:28,489 INFO L276 IsEmpty]: Start isEmpty. Operand 12010 states and 33272 transitions. [2021-07-13 18:22:28,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-07-13 18:22:28,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:28,590 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:28,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 18:22:28,590 INFO L430 AbstractCegarLoop]: === Iteration 3 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:28,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1279495094, now seen corresponding path program 1 times [2021-07-13 18:22:28,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:28,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873943987] [2021-07-13 18:22:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:28,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873943987] [2021-07-13 18:22:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873943987] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:22:28,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:22:28,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 18:22:28,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238056376] [2021-07-13 18:22:28,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 18:22:28,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:28,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 18:22:28,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:22:28,673 INFO L87 Difference]: Start difference. First operand 12010 states and 33272 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:28,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:28,722 INFO L93 Difference]: Finished difference Result 5338 states and 13928 transitions. [2021-07-13 18:22:28,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 18:22:28,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-07-13 18:22:28,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:28,749 INFO L225 Difference]: With dead ends: 5338 [2021-07-13 18:22:28,749 INFO L226 Difference]: Without dead ends: 5158 [2021-07-13 18:22:28,749 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 18:22:28,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5158 states. [2021-07-13 18:22:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5158 to 5062. [2021-07-13 18:22:28,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5062 states, 5060 states have (on average 2.6104743083003954) internal successors, (13209), 5061 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:28,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5062 states to 5062 states and 13209 transitions. [2021-07-13 18:22:28,838 INFO L78 Accepts]: Start accepts. Automaton has 5062 states and 13209 transitions. Word has length 80 [2021-07-13 18:22:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:28,840 INFO L482 AbstractCegarLoop]: Abstraction has 5062 states and 13209 transitions. [2021-07-13 18:22:28,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5062 states and 13209 transitions. [2021-07-13 18:22:28,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-07-13 18:22:28,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:28,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:28,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 18:22:28,850 INFO L430 AbstractCegarLoop]: === Iteration 4 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:28,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1751726349, now seen corresponding path program 1 times [2021-07-13 18:22:28,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:28,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548821710] [2021-07-13 18:22:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:29,005 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:29,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548821710] [2021-07-13 18:22:29,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548821710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:29,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204899039] [2021-07-13 18:22:29,006 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 [2021-07-13 18:22:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:29,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2021-07-13 18:22:29,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:29,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204899039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:29,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:29,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-07-13 18:22:29,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131046312] [2021-07-13 18:22:29,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 18:22:29,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:29,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 18:22:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:22:29,363 INFO L87 Difference]: Start difference. First operand 5062 states and 13209 transitions. Second operand has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:29,430 INFO L93 Difference]: Finished difference Result 7950 states and 20630 transitions. [2021-07-13 18:22:29,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 18:22:29,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-07-13 18:22:29,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:29,446 INFO L225 Difference]: With dead ends: 7950 [2021-07-13 18:22:29,446 INFO L226 Difference]: Without dead ends: 7950 [2021-07-13 18:22:29,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:22:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7950 states. [2021-07-13 18:22:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7950 to 7297. [2021-07-13 18:22:29,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7297 states, 7295 states have (on average 2.599451679232351) internal successors, (18963), 7296 states have internal predecessors, (18963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7297 states to 7297 states and 18963 transitions. [2021-07-13 18:22:29,608 INFO L78 Accepts]: Start accepts. Automaton has 7297 states and 18963 transitions. Word has length 89 [2021-07-13 18:22:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:29,609 INFO L482 AbstractCegarLoop]: Abstraction has 7297 states and 18963 transitions. [2021-07-13 18:22:29,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.428571428571427) internal successors, (136), 7 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 7297 states and 18963 transitions. [2021-07-13 18:22:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-07-13 18:22:29,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:29,621 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:29,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:29,843 INFO L430 AbstractCegarLoop]: === Iteration 5 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:29,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:29,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1590476080, now seen corresponding path program 1 times [2021-07-13 18:22:29,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:29,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914797649] [2021-07-13 18:22:29,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:29,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:29,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914797649] [2021-07-13 18:22:29,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914797649] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:22:29,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 18:22:29,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 18:22:29,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355713892] [2021-07-13 18:22:29,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 18:22:29,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:29,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 18:22:29,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 18:22:29,918 INFO L87 Difference]: Start difference. First operand 7297 states and 18963 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:30,079 INFO L93 Difference]: Finished difference Result 10552 states and 27328 transitions. [2021-07-13 18:22:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 18:22:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-07-13 18:22:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:30,105 INFO L225 Difference]: With dead ends: 10552 [2021-07-13 18:22:30,105 INFO L226 Difference]: Without dead ends: 10552 [2021-07-13 18:22:30,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 18:22:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10552 states. [2021-07-13 18:22:30,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10552 to 6645. [2021-07-13 18:22:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6645 states, 6643 states have (on average 2.577600481710071) internal successors, (17123), 6644 states have internal predecessors, (17123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6645 states to 6645 states and 17123 transitions. [2021-07-13 18:22:30,347 INFO L78 Accepts]: Start accepts. Automaton has 6645 states and 17123 transitions. Word has length 94 [2021-07-13 18:22:30,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:30,347 INFO L482 AbstractCegarLoop]: Abstraction has 6645 states and 17123 transitions. [2021-07-13 18:22:30,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 6645 states and 17123 transitions. [2021-07-13 18:22:30,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-07-13 18:22:30,357 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:30,357 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-07-13 18:22:30,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 18:22:30,357 INFO L430 AbstractCegarLoop]: === Iteration 6 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:30,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1829261201, now seen corresponding path program 2 times [2021-07-13 18:22:30,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:30,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327925239] [2021-07-13 18:22:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:30,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:30,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327925239] [2021-07-13 18:22:30,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327925239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:30,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178659291] [2021-07-13 18:22:30,421 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 [2021-07-13 18:22:30,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:30,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:30,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:22:30,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:30,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178659291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:30,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:30,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-13 18:22:30,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831839313] [2021-07-13 18:22:30,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 18:22:30,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:30,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 18:22:30,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-13 18:22:30,705 INFO L87 Difference]: Start difference. First operand 6645 states and 17123 transitions. Second operand has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:30,793 INFO L93 Difference]: Finished difference Result 9517 states and 24500 transitions. [2021-07-13 18:22:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 18:22:30,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-07-13 18:22:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:30,810 INFO L225 Difference]: With dead ends: 9517 [2021-07-13 18:22:30,811 INFO L226 Difference]: Without dead ends: 9517 [2021-07-13 18:22:30,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:22:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9517 states. [2021-07-13 18:22:30,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9517 to 8880. [2021-07-13 18:22:30,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8880 states, 8878 states have (on average 2.576819103401667) internal successors, (22877), 8879 states have internal predecessors, (22877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:30,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8880 states to 8880 states and 22877 transitions. [2021-07-13 18:22:30,965 INFO L78 Accepts]: Start accepts. Automaton has 8880 states and 22877 transitions. Word has length 124 [2021-07-13 18:22:30,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:30,965 INFO L482 AbstractCegarLoop]: Abstraction has 8880 states and 22877 transitions. [2021-07-13 18:22:30,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 19.0) internal successors, (171), 9 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:30,965 INFO L276 IsEmpty]: Start isEmpty. Operand 8880 states and 22877 transitions. [2021-07-13 18:22:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-07-13 18:22:30,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:30,976 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:31,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:31,195 INFO L430 AbstractCegarLoop]: === Iteration 7 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:31,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1136649656, now seen corresponding path program 1 times [2021-07-13 18:22:31,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:31,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176429243] [2021-07-13 18:22:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:31,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:31,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176429243] [2021-07-13 18:22:31,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176429243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:31,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825013740] [2021-07-13 18:22:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 18:22:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:31,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 18:22:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:31,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825013740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:31,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:31,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-07-13 18:22:31,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472707480] [2021-07-13 18:22:31,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 18:22:31,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:31,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 18:22:31,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 18:22:31,519 INFO L87 Difference]: Start difference. First operand 8880 states and 22877 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:31,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:31,640 INFO L93 Difference]: Finished difference Result 12150 states and 31382 transitions. [2021-07-13 18:22:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:22:31,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-07-13 18:22:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:31,659 INFO L225 Difference]: With dead ends: 12150 [2021-07-13 18:22:31,659 INFO L226 Difference]: Without dead ends: 12150 [2021-07-13 18:22:31,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-07-13 18:22:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 10700. [2021-07-13 18:22:31,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10700 states, 10698 states have (on average 2.598429613011778) internal successors, (27798), 10699 states have internal predecessors, (27798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10700 states to 10700 states and 27798 transitions. [2021-07-13 18:22:31,906 INFO L78 Accepts]: Start accepts. Automaton has 10700 states and 27798 transitions. Word has length 129 [2021-07-13 18:22:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:31,907 INFO L482 AbstractCegarLoop]: Abstraction has 10700 states and 27798 transitions. [2021-07-13 18:22:31,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 10700 states and 27798 transitions. [2021-07-13 18:22:31,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-07-13 18:22:31,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:31,924 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-07-13 18:22:32,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:32,143 INFO L430 AbstractCegarLoop]: === Iteration 8 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:32,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:32,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1360096717, now seen corresponding path program 3 times [2021-07-13 18:22:32,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:32,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828232943] [2021-07-13 18:22:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:32,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:32,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:32,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828232943] [2021-07-13 18:22:32,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828232943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:32,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363128626] [2021-07-13 18:22:32,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:32,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 18:22:32,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:22:32,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:32,575 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:32,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363128626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:32,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:32,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-13 18:22:32,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576252790] [2021-07-13 18:22:32,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 18:22:32,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:32,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 18:22:32,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-13 18:22:32,576 INFO L87 Difference]: Start difference. First operand 10700 states and 27798 transitions. Second operand has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:32,710 INFO L93 Difference]: Finished difference Result 14707 states and 37949 transitions. [2021-07-13 18:22:32,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 18:22:32,710 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-07-13 18:22:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:32,732 INFO L225 Difference]: With dead ends: 14707 [2021-07-13 18:22:32,732 INFO L226 Difference]: Without dead ends: 14707 [2021-07-13 18:22:32,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:22:32,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14707 states. [2021-07-13 18:22:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14707 to 12935. [2021-07-13 18:22:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:32,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-07-13 18:22:32,988 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 159 [2021-07-13 18:22:32,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:32,988 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-07-13 18:22:32,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 18.727272727272727) internal successors, (206), 11 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:32,988 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-07-13 18:22:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-07-13 18:22:33,007 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:33,007 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:33,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:33,224 INFO L430 AbstractCegarLoop]: === Iteration 9 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -72462384, now seen corresponding path program 2 times [2021-07-13 18:22:33,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:33,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567718189] [2021-07-13 18:22:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:33,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:33,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567718189] [2021-07-13 18:22:33,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567718189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:33,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790565661] [2021-07-13 18:22:33,298 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 [2021-07-13 18:22:33,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:33,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 18:22:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:33,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790565661] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:33,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:33,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-07-13 18:22:33,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499346832] [2021-07-13 18:22:33,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:22:33,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:33,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:22:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:22:33,622 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:33,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:33,758 INFO L93 Difference]: Finished difference Result 17340 states and 44831 transitions. [2021-07-13 18:22:33,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 18:22:33,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2021-07-13 18:22:33,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:33,785 INFO L225 Difference]: With dead ends: 17340 [2021-07-13 18:22:33,785 INFO L226 Difference]: Without dead ends: 17340 [2021-07-13 18:22:33,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 62.4ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17340 states. [2021-07-13 18:22:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17340 to 12935. [2021-07-13 18:22:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12935 states, 12933 states have (on average 2.5942936673625607) internal successors, (33552), 12934 states have internal predecessors, (33552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12935 states to 12935 states and 33552 transitions. [2021-07-13 18:22:34,039 INFO L78 Accepts]: Start accepts. Automaton has 12935 states and 33552 transitions. Word has length 164 [2021-07-13 18:22:34,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:34,039 INFO L482 AbstractCegarLoop]: Abstraction has 12935 states and 33552 transitions. [2021-07-13 18:22:34,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 20.2) internal successors, (202), 10 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:34,039 INFO L276 IsEmpty]: Start isEmpty. Operand 12935 states and 33552 transitions. [2021-07-13 18:22:34,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-07-13 18:22:34,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:34,058 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2021-07-13 18:22:34,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:34,274 INFO L430 AbstractCegarLoop]: === Iteration 10 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:34,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1339210833, now seen corresponding path program 4 times [2021-07-13 18:22:34,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:34,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803947318] [2021-07-13 18:22:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:34,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:34,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803947318] [2021-07-13 18:22:34,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803947318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:34,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47649272] [2021-07-13 18:22:34,371 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 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 [2021-07-13 18:22:34,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:34,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:34,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:22:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:34,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47649272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:34,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:34,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:22:34,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163954474] [2021-07-13 18:22:34,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:22:34,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:34,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:22:34,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:22:34,807 INFO L87 Difference]: Start difference. First operand 12935 states and 33552 transitions. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:34,980 INFO L93 Difference]: Finished difference Result 17022 states and 43907 transitions. [2021-07-13 18:22:34,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 18:22:34,980 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2021-07-13 18:22:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:35,007 INFO L225 Difference]: With dead ends: 17022 [2021-07-13 18:22:35,007 INFO L226 Difference]: Without dead ends: 17022 [2021-07-13 18:22:35,008 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:22:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-07-13 18:22:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 15170. [2021-07-13 18:22:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15170 states, 15168 states have (on average 2.591376582278481) internal successors, (39306), 15169 states have internal predecessors, (39306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:35,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15170 states to 15170 states and 39306 transitions. [2021-07-13 18:22:35,299 INFO L78 Accepts]: Start accepts. Automaton has 15170 states and 39306 transitions. Word has length 194 [2021-07-13 18:22:35,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:35,299 INFO L482 AbstractCegarLoop]: Abstraction has 15170 states and 39306 transitions. [2021-07-13 18:22:35,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 15170 states and 39306 transitions. [2021-07-13 18:22:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-07-13 18:22:35,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:35,320 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:35,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:35,536 INFO L430 AbstractCegarLoop]: === Iteration 11 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:35,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:35,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1841425736, now seen corresponding path program 3 times [2021-07-13 18:22:35,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:35,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871418611] [2021-07-13 18:22:35,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 136 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:35,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:35,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871418611] [2021-07-13 18:22:35,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871418611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:35,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580290022] [2021-07-13 18:22:35,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:35,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 18:22:35,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:35,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 18:22:35,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-07-13 18:22:36,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580290022] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 18:22:36,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 18:22:36,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2021-07-13 18:22:36,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256319292] [2021-07-13 18:22:36,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 18:22:36,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 18:22:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:36,032 INFO L87 Difference]: Start difference. First operand 15170 states and 39306 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:36,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:36,177 INFO L93 Difference]: Finished difference Result 19600 states and 50777 transitions. [2021-07-13 18:22:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 18:22:36,178 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-07-13 18:22:36,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:36,209 INFO L225 Difference]: With dead ends: 19600 [2021-07-13 18:22:36,210 INFO L226 Difference]: Without dead ends: 19600 [2021-07-13 18:22:36,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:22:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19600 states. [2021-07-13 18:22:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19600 to 16390. [2021-07-13 18:22:36,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16390 states, 16388 states have (on average 2.5980595557725166) internal successors, (42577), 16389 states have internal predecessors, (42577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16390 states to 16390 states and 42577 transitions. [2021-07-13 18:22:36,482 INFO L78 Accepts]: Start accepts. Automaton has 16390 states and 42577 transitions. Word has length 199 [2021-07-13 18:22:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:36,482 INFO L482 AbstractCegarLoop]: Abstraction has 16390 states and 42577 transitions. [2021-07-13 18:22:36,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 16390 states and 42577 transitions. [2021-07-13 18:22:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-07-13 18:22:36,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:36,502 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:36,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:36,718 INFO L430 AbstractCegarLoop]: === Iteration 12 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:36,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash 384712, now seen corresponding path program 4 times [2021-07-13 18:22:36,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:36,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641361243] [2021-07-13 18:22:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 138 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:22:36,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641361243] [2021-07-13 18:22:36,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641361243] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:36,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8445393] [2021-07-13 18:22:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:36,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:22:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:36,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 18:22:36,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 9 proven. 115 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:37,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8445393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:37,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:37,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-07-13 18:22:37,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029693743] [2021-07-13 18:22:37,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 18:22:37,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:37,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 18:22:37,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-07-13 18:22:37,163 INFO L87 Difference]: Start difference. First operand 16390 states and 42577 transitions. Second operand has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:37,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:37,342 INFO L93 Difference]: Finished difference Result 21425 states and 55669 transitions. [2021-07-13 18:22:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 18:22:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-07-13 18:22:37,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:37,377 INFO L225 Difference]: With dead ends: 21425 [2021-07-13 18:22:37,377 INFO L226 Difference]: Without dead ends: 21425 [2021-07-13 18:22:37,377 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:22:37,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21425 states. [2021-07-13 18:22:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21425 to 18210. [2021-07-13 18:22:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18210 states, 18208 states have (on average 2.608633567662566) internal successors, (47498), 18209 states have internal predecessors, (47498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18210 states to 18210 states and 47498 transitions. [2021-07-13 18:22:37,809 INFO L78 Accepts]: Start accepts. Automaton has 18210 states and 47498 transitions. Word has length 199 [2021-07-13 18:22:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:37,810 INFO L482 AbstractCegarLoop]: Abstraction has 18210 states and 47498 transitions. [2021-07-13 18:22:37,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 21.5) internal successors, (215), 10 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 18210 states and 47498 transitions. [2021-07-13 18:22:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-07-13 18:22:37,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:37,833 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1] [2021-07-13 18:22:38,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 18:22:38,046 INFO L430 AbstractCegarLoop]: === Iteration 13 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash 485036685, now seen corresponding path program 5 times [2021-07-13 18:22:38,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:38,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706893589] [2021-07-13 18:22:38,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:38,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:38,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706893589] [2021-07-13 18:22:38,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706893589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:38,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435457360] [2021-07-13 18:22:38,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:38,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 18:22:38,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:22:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:38,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435457360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:38,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:38,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:22:38,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374016058] [2021-07-13 18:22:38,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:38,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:38,687 INFO L87 Difference]: Start difference. First operand 18210 states and 47498 transitions. Second operand has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:38,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:38,906 INFO L93 Difference]: Finished difference Result 23982 states and 62236 transitions. [2021-07-13 18:22:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 18:22:38,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 229 [2021-07-13 18:22:38,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:38,944 INFO L225 Difference]: With dead ends: 23982 [2021-07-13 18:22:38,944 INFO L226 Difference]: Without dead ends: 23982 [2021-07-13 18:22:38,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:22:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23982 states. [2021-07-13 18:22:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23982 to 20445. [2021-07-13 18:22:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20445 states, 20443 states have (on average 2.6049014332534366) internal successors, (53252), 20444 states have internal predecessors, (53252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:39,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20445 states to 20445 states and 53252 transitions. [2021-07-13 18:22:39,310 INFO L78 Accepts]: Start accepts. Automaton has 20445 states and 53252 transitions. Word has length 229 [2021-07-13 18:22:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:39,310 INFO L482 AbstractCegarLoop]: Abstraction has 20445 states and 53252 transitions. [2021-07-13 18:22:39,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 18.4) internal successors, (276), 15 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:39,310 INFO L276 IsEmpty]: Start isEmpty. Operand 20445 states and 53252 transitions. [2021-07-13 18:22:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-07-13 18:22:39,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:39,335 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:39,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:39,553 INFO L430 AbstractCegarLoop]: === Iteration 14 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:39,553 INFO L82 PathProgramCache]: Analyzing trace with hash -958787801, now seen corresponding path program 1 times [2021-07-13 18:22:39,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:39,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108666106] [2021-07-13 18:22:39,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:39,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:39,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108666106] [2021-07-13 18:22:39,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108666106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:39,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353194558] [2021-07-13 18:22:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-07-13 18:22:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:39,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:22:39,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:40,103 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 54 proven. 122 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:40,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353194558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:40,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:40,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-13 18:22:40,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767833469] [2021-07-13 18:22:40,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 18:22:40,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:40,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 18:22:40,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-07-13 18:22:40,105 INFO L87 Difference]: Start difference. First operand 20445 states and 53252 transitions. Second operand has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:40,323 INFO L93 Difference]: Finished difference Result 31205 states and 80942 transitions. [2021-07-13 18:22:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 18:22:40,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-07-13 18:22:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:40,379 INFO L225 Difference]: With dead ends: 31205 [2021-07-13 18:22:40,379 INFO L226 Difference]: Without dead ends: 31205 [2021-07-13 18:22:40,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:22:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31205 states. [2021-07-13 18:22:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31205 to 19965. [2021-07-13 18:22:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19965 states, 19963 states have (on average 2.602214096077744) internal successors, (51948), 19964 states have internal predecessors, (51948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19965 states to 19965 states and 51948 transitions. [2021-07-13 18:22:40,821 INFO L78 Accepts]: Start accepts. Automaton has 19965 states and 51948 transitions. Word has length 233 [2021-07-13 18:22:40,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:40,821 INFO L482 AbstractCegarLoop]: Abstraction has 19965 states and 51948 transitions. [2021-07-13 18:22:40,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:40,821 INFO L276 IsEmpty]: Start isEmpty. Operand 19965 states and 51948 transitions. [2021-07-13 18:22:40,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-07-13 18:22:40,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:40,844 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:41,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:41,061 INFO L430 AbstractCegarLoop]: === Iteration 15 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:41,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:41,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1621157676, now seen corresponding path program 5 times [2021-07-13 18:22:41,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:41,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281131997] [2021-07-13 18:22:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:41,151 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 258 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:22:41,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:41,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281131997] [2021-07-13 18:22:41,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281131997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:41,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850853501] [2021-07-13 18:22:41,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 18:22:41,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 18:22:41,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 18:22:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 12 proven. 235 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:41,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850853501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:41,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:41,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-07-13 18:22:41,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620957686] [2021-07-13 18:22:41,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 18:22:41,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:41,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 18:22:41,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-07-13 18:22:41,590 INFO L87 Difference]: Start difference. First operand 19965 states and 51948 transitions. Second operand has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:41,908 INFO L93 Difference]: Finished difference Result 27170 states and 70572 transitions. [2021-07-13 18:22:41,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:22:41,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 234 [2021-07-13 18:22:41,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:41,954 INFO L225 Difference]: With dead ends: 27170 [2021-07-13 18:22:41,954 INFO L226 Difference]: Without dead ends: 27170 [2021-07-13 18:22:41,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:22:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27170 states. [2021-07-13 18:22:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27170 to 22865. [2021-07-13 18:22:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22865 states, 22863 states have (on average 2.6165857499015877) internal successors, (59823), 22864 states have internal predecessors, (59823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22865 states to 22865 states and 59823 transitions. [2021-07-13 18:22:42,461 INFO L78 Accepts]: Start accepts. Automaton has 22865 states and 59823 transitions. Word has length 234 [2021-07-13 18:22:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:42,461 INFO L482 AbstractCegarLoop]: Abstraction has 22865 states and 59823 transitions. [2021-07-13 18:22:42,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 20.833333333333332) internal successors, (250), 12 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 22865 states and 59823 transitions. [2021-07-13 18:22:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-07-13 18:22:42,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:42,488 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1] [2021-07-13 18:22:42,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 18:22:42,705 INFO L430 AbstractCegarLoop]: === Iteration 16 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:42,705 INFO L82 PathProgramCache]: Analyzing trace with hash 209544943, now seen corresponding path program 6 times [2021-07-13 18:22:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:42,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794586538] [2021-07-13 18:22:42,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:42,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:42,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794586538] [2021-07-13 18:22:42,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794586538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:42,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138069725] [2021-07-13 18:22:42,924 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 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 [2021-07-13 18:22:43,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:22:43,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:43,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:43,504 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 615 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:43,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138069725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:43,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:43,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:22:43,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675644092] [2021-07-13 18:22:43,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:22:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:43,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:22:43,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:22:43,506 INFO L87 Difference]: Start difference. First operand 22865 states and 59823 transitions. Second operand has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:43,776 INFO L93 Difference]: Finished difference Result 29242 states and 75990 transitions. [2021-07-13 18:22:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:22:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 264 [2021-07-13 18:22:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:43,828 INFO L225 Difference]: With dead ends: 29242 [2021-07-13 18:22:43,829 INFO L226 Difference]: Without dead ends: 29242 [2021-07-13 18:22:43,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 171.5ms TimeCoverageRelationStatistics Valid=263, Invalid=549, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:22:43,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29242 states. [2021-07-13 18:22:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29242 to 25100. [2021-07-13 18:22:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-07-13 18:22:44,279 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 264 [2021-07-13 18:22:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:44,279 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-07-13 18:22:44,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 18.294117647058822) internal successors, (311), 17 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-07-13 18:22:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-07-13 18:22:44,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:44,311 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:44,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 18:22:44,528 INFO L430 AbstractCegarLoop]: === Iteration 17 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:44,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:44,528 INFO L82 PathProgramCache]: Analyzing trace with hash 85318831, now seen corresponding path program 2 times [2021-07-13 18:22:44,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:44,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296202824] [2021-07-13 18:22:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 57 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:44,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:44,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296202824] [2021-07-13 18:22:44,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296202824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:44,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499603761] [2021-07-13 18:22:44,631 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 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 [2021-07-13 18:22:44,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:44,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:44,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:44,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 57 proven. 242 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-13 18:22:45,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499603761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:45,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:45,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:22:45,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663197218] [2021-07-13 18:22:45,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:22:45,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:45,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:22:45,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:22:45,106 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:45,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:45,537 INFO L93 Difference]: Finished difference Result 38575 states and 100043 transitions. [2021-07-13 18:22:45,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:22:45,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-07-13 18:22:45,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:45,605 INFO L225 Difference]: With dead ends: 38575 [2021-07-13 18:22:45,606 INFO L226 Difference]: Without dead ends: 38575 [2021-07-13 18:22:45,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 137.0ms TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:22:45,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38575 states. [2021-07-13 18:22:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38575 to 25100. [2021-07-13 18:22:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:46,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-07-13 18:22:46,137 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 268 [2021-07-13 18:22:46,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:46,137 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-07-13 18:22:46,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 20.4) internal successors, (306), 15 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:46,138 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-07-13 18:22:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-07-13 18:22:46,167 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:46,167 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:46,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 18:22:46,383 INFO L430 AbstractCegarLoop]: === Iteration 18 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash 681376844, now seen corresponding path program 6 times [2021-07-13 18:22:46,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:46,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929395236] [2021-07-13 18:22:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:46,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:46,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929395236] [2021-07-13 18:22:46,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929395236] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:46,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259869077] [2021-07-13 18:22:46,476 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 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 [2021-07-13 18:22:46,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-13 18:22:46,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:46,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:46,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:47,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259869077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:47,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:47,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-13 18:22:47,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139112373] [2021-07-13 18:22:47,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:22:47,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:47,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:22:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:47,086 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:47,338 INFO L93 Difference]: Finished difference Result 35570 states and 92379 transitions. [2021-07-13 18:22:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 18:22:47,339 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-07-13 18:22:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:47,481 INFO L225 Difference]: With dead ends: 35570 [2021-07-13 18:22:47,481 INFO L226 Difference]: Without dead ends: 35570 [2021-07-13 18:22:47,481 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:22:47,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35570 states. [2021-07-13 18:22:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35570 to 25100. [2021-07-13 18:22:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25100 states, 25098 states have (on average 2.612837676308869) internal successors, (65577), 25099 states have internal predecessors, (65577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25100 states to 25100 states and 65577 transitions. [2021-07-13 18:22:48,116 INFO L78 Accepts]: Start accepts. Automaton has 25100 states and 65577 transitions. Word has length 269 [2021-07-13 18:22:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:48,117 INFO L482 AbstractCegarLoop]: Abstraction has 25100 states and 65577 transitions. [2021-07-13 18:22:48,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:48,117 INFO L276 IsEmpty]: Start isEmpty. Operand 25100 states and 65577 transitions. [2021-07-13 18:22:48,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-07-13 18:22:48,146 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:48,146 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:48,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:48,363 INFO L430 AbstractCegarLoop]: === Iteration 19 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:48,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:48,363 INFO L82 PathProgramCache]: Analyzing trace with hash -14531768, now seen corresponding path program 7 times [2021-07-13 18:22:48,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:48,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958731195] [2021-07-13 18:22:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 413 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:22:48,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:48,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958731195] [2021-07-13 18:22:48,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958731195] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:48,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053780193] [2021-07-13 18:22:48,468 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 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 [2021-07-13 18:22:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 18:22:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:48,825 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:22:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 15 proven. 390 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:49,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053780193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:49,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:49,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-07-13 18:22:49,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504778870] [2021-07-13 18:22:49,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 18:22:49,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:49,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 18:22:49,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-13 18:22:49,013 INFO L87 Difference]: Start difference. First operand 25100 states and 65577 transitions. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:49,264 INFO L93 Difference]: Finished difference Result 34595 states and 90013 transitions. [2021-07-13 18:22:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:22:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2021-07-13 18:22:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:49,324 INFO L225 Difference]: With dead ends: 34595 [2021-07-13 18:22:49,324 INFO L226 Difference]: Without dead ends: 34595 [2021-07-13 18:22:49,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=194, Invalid=456, Unknown=0, NotChecked=0, Total=650 [2021-07-13 18:22:49,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34595 states. [2021-07-13 18:22:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34595 to 26920. [2021-07-13 18:22:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26920 states, 26918 states have (on average 2.618991009733264) internal successors, (70498), 26919 states have internal predecessors, (70498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:50,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26920 states to 26920 states and 70498 transitions. [2021-07-13 18:22:50,090 INFO L78 Accepts]: Start accepts. Automaton has 26920 states and 70498 transitions. Word has length 269 [2021-07-13 18:22:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:50,091 INFO L482 AbstractCegarLoop]: Abstraction has 26920 states and 70498 transitions. [2021-07-13 18:22:50,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 26920 states and 70498 transitions. [2021-07-13 18:22:50,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-07-13 18:22:50,128 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:50,129 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1] [2021-07-13 18:22:50,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:50,345 INFO L430 AbstractCegarLoop]: === Iteration 20 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:50,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1826871475, now seen corresponding path program 7 times [2021-07-13 18:22:50,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:50,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910972560] [2021-07-13 18:22:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:50,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:50,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910972560] [2021-07-13 18:22:50,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910972560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:50,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562743283] [2021-07-13 18:22:50,490 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 [2021-07-13 18:22:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:50,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:22:51,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562743283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:51,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:51,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:22:51,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801334662] [2021-07-13 18:22:51,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:22:51,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:51,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:22:51,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:22:51,052 INFO L87 Difference]: Start difference. First operand 26920 states and 70498 transitions. Second operand has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:51,367 INFO L93 Difference]: Finished difference Result 36062 states and 94002 transitions. [2021-07-13 18:22:51,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:22:51,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 299 [2021-07-13 18:22:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:51,430 INFO L225 Difference]: With dead ends: 36062 [2021-07-13 18:22:51,430 INFO L226 Difference]: Without dead ends: 36062 [2021-07-13 18:22:51,431 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=340, Invalid=716, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:22:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36062 states. [2021-07-13 18:22:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36062 to 30235. [2021-07-13 18:22:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30235 states, 30233 states have (on average 2.6198524790791518) internal successors, (79206), 30234 states have internal predecessors, (79206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:52,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30235 states to 30235 states and 79206 transitions. [2021-07-13 18:22:52,097 INFO L78 Accepts]: Start accepts. Automaton has 30235 states and 79206 transitions. Word has length 299 [2021-07-13 18:22:52,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:52,098 INFO L482 AbstractCegarLoop]: Abstraction has 30235 states and 79206 transitions. [2021-07-13 18:22:52,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 18.210526315789473) internal successors, (346), 19 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:52,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30235 states and 79206 transitions. [2021-07-13 18:22:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-07-13 18:22:52,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:52,142 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:52,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:52,349 INFO L430 AbstractCegarLoop]: === Iteration 21 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:52,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:52,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1174069078, now seen corresponding path program 3 times [2021-07-13 18:22:52,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:52,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251699767] [2021-07-13 18:22:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 58 proven. 294 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-07-13 18:22:52,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251699767] [2021-07-13 18:22:52,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251699767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:52,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704483751] [2021-07-13 18:22:52,573 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 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 [2021-07-13 18:22:52,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 18:22:52,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:52,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-13 18:22:52,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-07-13 18:22:53,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704483751] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:53,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:53,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-07-13 18:22:53,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002143020] [2021-07-13 18:22:53,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:22:53,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:22:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:22:53,182 INFO L87 Difference]: Start difference. First operand 30235 states and 79206 transitions. Second operand has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:53,968 INFO L93 Difference]: Finished difference Result 69690 states and 181990 transitions. [2021-07-13 18:22:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 18:22:53,969 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 302 [2021-07-13 18:22:53,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:54,103 INFO L225 Difference]: With dead ends: 69690 [2021-07-13 18:22:54,104 INFO L226 Difference]: Without dead ends: 69690 [2021-07-13 18:22:54,104 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 364.2ms TimeCoverageRelationStatistics Valid=536, Invalid=1816, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 18:22:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69690 states. [2021-07-13 18:22:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69690 to 38635. [2021-07-13 18:22:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38635 states, 38633 states have (on average 2.638625009706727) internal successors, (101938), 38634 states have internal predecessors, (101938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38635 states to 38635 states and 101938 transitions. [2021-07-13 18:22:55,254 INFO L78 Accepts]: Start accepts. Automaton has 38635 states and 101938 transitions. Word has length 302 [2021-07-13 18:22:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:55,255 INFO L482 AbstractCegarLoop]: Abstraction has 38635 states and 101938 transitions. [2021-07-13 18:22:55,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 24.476190476190474) internal successors, (514), 21 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:55,255 INFO L276 IsEmpty]: Start isEmpty. Operand 38635 states and 101938 transitions. [2021-07-13 18:22:55,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:22:55,309 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:55,309 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:55,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 18:22:55,525 INFO L430 AbstractCegarLoop]: === Iteration 22 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:55,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1750337364, now seen corresponding path program 8 times [2021-07-13 18:22:55,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:55,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728793308] [2021-07-13 18:22:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:55,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:55,652 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:55,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:55,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728793308] [2021-07-13 18:22:55,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728793308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:55,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363405331] [2021-07-13 18:22:55,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:56,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:22:56,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:56,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:56,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:56,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363405331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:56,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:56,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:22:56,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718183717] [2021-07-13 18:22:56,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:56,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:56,383 INFO L87 Difference]: Start difference. First operand 38635 states and 101938 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:56,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:56,948 INFO L93 Difference]: Finished difference Result 58520 states and 153912 transitions. [2021-07-13 18:22:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:22:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-07-13 18:22:56,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:57,062 INFO L225 Difference]: With dead ends: 58520 [2021-07-13 18:22:57,062 INFO L226 Difference]: Without dead ends: 58520 [2021-07-13 18:22:57,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=238, Invalid=692, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:22:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58520 states. [2021-07-13 18:22:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58520 to 40455. [2021-07-13 18:22:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40455 states, 40453 states have (on average 2.6415593404691866) internal successors, (106859), 40454 states have internal predecessors, (106859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:58,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40455 states to 40455 states and 106859 transitions. [2021-07-13 18:22:58,268 INFO L78 Accepts]: Start accepts. Automaton has 40455 states and 106859 transitions. Word has length 304 [2021-07-13 18:22:58,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:22:58,268 INFO L482 AbstractCegarLoop]: Abstraction has 40455 states and 106859 transitions. [2021-07-13 18:22:58,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:58,268 INFO L276 IsEmpty]: Start isEmpty. Operand 40455 states and 106859 transitions. [2021-07-13 18:22:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:22:58,324 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:22:58,325 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:22:58,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 18:22:58,542 INFO L430 AbstractCegarLoop]: === Iteration 23 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:22:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:22:58,543 INFO L82 PathProgramCache]: Analyzing trace with hash 466033488, now seen corresponding path program 9 times [2021-07-13 18:22:58,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:22:58,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480724815] [2021-07-13 18:22:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:22:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:22:58,663 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:58,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:22:58,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480724815] [2021-07-13 18:22:58,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480724815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:58,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727882699] [2021-07-13 18:22:58,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:22:58,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-13 18:22:58,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:22:58,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:22:58,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:22:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:22:59,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727882699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:22:59,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:22:59,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:22:59,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361822641] [2021-07-13 18:22:59,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:22:59,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:22:59,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:22:59,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:22:59,245 INFO L87 Difference]: Start difference. First operand 40455 states and 106859 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:22:59,459 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 18:22:59,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:22:59,815 INFO L93 Difference]: Finished difference Result 60835 states and 160146 transitions. [2021-07-13 18:22:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:22:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-07-13 18:22:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:22:59,937 INFO L225 Difference]: With dead ends: 60835 [2021-07-13 18:22:59,937 INFO L226 Difference]: Without dead ends: 60835 [2021-07-13 18:22:59,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:23:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60835 states. [2021-07-13 18:23:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60835 to 42275. [2021-07-13 18:23:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42275 states, 42273 states have (on average 2.6442410048967426) internal successors, (111780), 42274 states have internal predecessors, (111780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:01,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42275 states to 42275 states and 111780 transitions. [2021-07-13 18:23:01,100 INFO L78 Accepts]: Start accepts. Automaton has 42275 states and 111780 transitions. Word has length 304 [2021-07-13 18:23:01,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:01,100 INFO L482 AbstractCegarLoop]: Abstraction has 42275 states and 111780 transitions. [2021-07-13 18:23:01,101 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:01,101 INFO L276 IsEmpty]: Start isEmpty. Operand 42275 states and 111780 transitions. [2021-07-13 18:23:01,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:23:01,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:01,161 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:01,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 18:23:01,378 INFO L430 AbstractCegarLoop]: === Iteration 24 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:01,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:01,379 INFO L82 PathProgramCache]: Analyzing trace with hash -86071852, now seen corresponding path program 10 times [2021-07-13 18:23:01,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:01,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443450280] [2021-07-13 18:23:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:01,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443450280] [2021-07-13 18:23:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443450280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65324119] [2021-07-13 18:23:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:01,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:23:01,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:01,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:23:01,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:02,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65324119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:02,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:02,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:23:02,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667047138] [2021-07-13 18:23:02,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:23:02,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:02,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:23:02,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:23:02,488 INFO L87 Difference]: Start difference. First operand 42275 states and 111780 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:02,862 INFO L93 Difference]: Finished difference Result 62310 states and 163598 transitions. [2021-07-13 18:23:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:23:02,862 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-07-13 18:23:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:03,183 INFO L225 Difference]: With dead ends: 62310 [2021-07-13 18:23:03,185 INFO L226 Difference]: Without dead ends: 62310 [2021-07-13 18:23:03,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=222, Invalid=590, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:23:03,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62310 states. [2021-07-13 18:23:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62310 to 43355. [2021-07-13 18:23:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43355 states, 43353 states have (on average 2.646506585472747) internal successors, (114734), 43354 states have internal predecessors, (114734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43355 states to 43355 states and 114734 transitions. [2021-07-13 18:23:04,019 INFO L78 Accepts]: Start accepts. Automaton has 43355 states and 114734 transitions. Word has length 304 [2021-07-13 18:23:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:04,020 INFO L482 AbstractCegarLoop]: Abstraction has 43355 states and 114734 transitions. [2021-07-13 18:23:04,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 43355 states and 114734 transitions. [2021-07-13 18:23:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:23:04,074 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:04,075 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:04,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 18:23:04,289 INFO L430 AbstractCegarLoop]: === Iteration 25 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:04,289 INFO L82 PathProgramCache]: Analyzing trace with hash -781980464, now seen corresponding path program 11 times [2021-07-13 18:23:04,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:04,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296149323] [2021-07-13 18:23:04,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:04,737 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:23:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:04,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:04,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296149323] [2021-07-13 18:23:04,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296149323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:04,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666759412] [2021-07-13 18:23:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:05,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 18:23:05,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:23:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:05,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666759412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:05,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:05,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:23:05,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87087565] [2021-07-13 18:23:05,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:23:05,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:23:05,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:23:05,366 INFO L87 Difference]: Start difference. First operand 43355 states and 114734 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:06,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:06,004 INFO L93 Difference]: Finished difference Result 61860 states and 162764 transitions. [2021-07-13 18:23:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 18:23:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-07-13 18:23:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:06,124 INFO L225 Difference]: With dead ends: 61860 [2021-07-13 18:23:06,125 INFO L226 Difference]: Without dead ends: 61860 [2021-07-13 18:23:06,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-07-13 18:23:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61860 states. [2021-07-13 18:23:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61860 to 46255. [2021-07-13 18:23:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46255 states, 46253 states have (on average 2.650833459451279) internal successors, (122609), 46254 states have internal predecessors, (122609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46255 states to 46255 states and 122609 transitions. [2021-07-13 18:23:07,177 INFO L78 Accepts]: Start accepts. Automaton has 46255 states and 122609 transitions. Word has length 304 [2021-07-13 18:23:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:07,178 INFO L482 AbstractCegarLoop]: Abstraction has 46255 states and 122609 transitions. [2021-07-13 18:23:07,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 46255 states and 122609 transitions. [2021-07-13 18:23:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2021-07-13 18:23:07,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:07,618 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:07,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 18:23:07,833 INFO L430 AbstractCegarLoop]: === Iteration 26 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:07,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1013212244, now seen corresponding path program 12 times [2021-07-13 18:23:07,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:07,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725809842] [2021-07-13 18:23:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 603 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:23:08,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:08,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725809842] [2021-07-13 18:23:08,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725809842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:08,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004392559] [2021-07-13 18:23:08,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:08,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:23:08,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 18:23:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 18 proven. 580 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:08,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004392559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:08,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:08,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:23:08,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990061546] [2021-07-13 18:23:08,751 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:23:08,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:23:08,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:23:08,752 INFO L87 Difference]: Start difference. First operand 46255 states and 122609 transitions. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:09,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:09,375 INFO L93 Difference]: Finished difference Result 58480 states and 154067 transitions. [2021-07-13 18:23:09,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:23:09,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2021-07-13 18:23:09,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:09,489 INFO L225 Difference]: With dead ends: 58480 [2021-07-13 18:23:09,489 INFO L226 Difference]: Without dead ends: 58480 [2021-07-13 18:23:09,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:23:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58480 states. [2021-07-13 18:23:10,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58480 to 49155. [2021-07-13 18:23:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49155 states, 49153 states have (on average 2.654649767053893) internal successors, (130484), 49154 states have internal predecessors, (130484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:10,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49155 states to 49155 states and 130484 transitions. [2021-07-13 18:23:10,841 INFO L78 Accepts]: Start accepts. Automaton has 49155 states and 130484 transitions. Word has length 304 [2021-07-13 18:23:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:10,841 INFO L482 AbstractCegarLoop]: Abstraction has 49155 states and 130484 transitions. [2021-07-13 18:23:10,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:10,842 INFO L276 IsEmpty]: Start isEmpty. Operand 49155 states and 130484 transitions. [2021-07-13 18:23:10,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2021-07-13 18:23:10,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:10,902 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:11,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:11,119 INFO L430 AbstractCegarLoop]: === Iteration 27 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:11,120 INFO L82 PathProgramCache]: Analyzing trace with hash 826022447, now seen corresponding path program 8 times [2021-07-13 18:23:11,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:11,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511078324] [2021-07-13 18:23:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:23:11,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:11,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511078324] [2021-07-13 18:23:11,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511078324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:11,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866049588] [2021-07-13 18:23:11,278 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 [2021-07-13 18:23:11,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:11,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:11,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 652 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:11,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:11,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:23:11,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866049588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:11,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:11,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:23:11,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852674643] [2021-07-13 18:23:11,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:23:11,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:11,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:23:11,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:23:11,898 INFO L87 Difference]: Start difference. First operand 49155 states and 130484 transitions. Second operand has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:12,382 INFO L93 Difference]: Finished difference Result 57822 states and 152463 transitions. [2021-07-13 18:23:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:23:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 334 [2021-07-13 18:23:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:12,494 INFO L225 Difference]: With dead ends: 57822 [2021-07-13 18:23:12,494 INFO L226 Difference]: Without dead ends: 57822 [2021-07-13 18:23:12,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 247.6ms TimeCoverageRelationStatistics Valid=427, Invalid=905, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:23:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57822 states. [2021-07-13 18:23:13,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57822 to 51390. [2021-07-13 18:23:13,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51390 states, 51388 states have (on average 2.6511636958044678) internal successors, (136238), 51389 states have internal predecessors, (136238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:13,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51390 states to 51390 states and 136238 transitions. [2021-07-13 18:23:13,630 INFO L78 Accepts]: Start accepts. Automaton has 51390 states and 136238 transitions. Word has length 334 [2021-07-13 18:23:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:13,631 INFO L482 AbstractCegarLoop]: Abstraction has 51390 states and 136238 transitions. [2021-07-13 18:23:13,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 18.142857142857142) internal successors, (381), 21 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:13,631 INFO L276 IsEmpty]: Start isEmpty. Operand 51390 states and 136238 transitions. [2021-07-13 18:23:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:23:13,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:13,701 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:13,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 18:23:13,918 INFO L430 AbstractCegarLoop]: === Iteration 28 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash 764082061, now seen corresponding path program 4 times [2021-07-13 18:23:13,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:13,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705498781] [2021-07-13 18:23:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:14,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:14,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705498781] [2021-07-13 18:23:14,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705498781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:14,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272067702] [2021-07-13 18:23:14,135 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 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 [2021-07-13 18:23:14,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:23:14,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:14,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:14,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:15,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272067702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:15,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:15,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:23:15,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336417659] [2021-07-13 18:23:15,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:23:15,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:23:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:23:15,093 INFO L87 Difference]: Start difference. First operand 51390 states and 136238 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:15,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:15,490 INFO L93 Difference]: Finished difference Result 76125 states and 201014 transitions. [2021-07-13 18:23:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:23:15,490 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-07-13 18:23:15,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:15,849 INFO L225 Difference]: With dead ends: 76125 [2021-07-13 18:23:15,849 INFO L226 Difference]: Without dead ends: 76125 [2021-07-13 18:23:15,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:23:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76125 states. [2021-07-13 18:23:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76125 to 53550. [2021-07-13 18:23:16,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53550 states, 53548 states have (on average 2.6545529244789723) internal successors, (142146), 53549 states have internal predecessors, (142146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53550 states to 53550 states and 142146 transitions. [2021-07-13 18:23:17,319 INFO L78 Accepts]: Start accepts. Automaton has 53550 states and 142146 transitions. Word has length 338 [2021-07-13 18:23:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:17,319 INFO L482 AbstractCegarLoop]: Abstraction has 53550 states and 142146 transitions. [2021-07-13 18:23:17,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 53550 states and 142146 transitions. [2021-07-13 18:23:17,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:23:17,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:17,405 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:17,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:17,621 INFO L430 AbstractCegarLoop]: === Iteration 29 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:17,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash -361196817, now seen corresponding path program 5 times [2021-07-13 18:23:17,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:17,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821322815] [2021-07-13 18:23:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:17,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:17,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821322815] [2021-07-13 18:23:17,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821322815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:17,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736301988] [2021-07-13 18:23:17,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:18,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-13 18:23:18,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:18,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:18,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:18,387 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:18,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736301988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:18,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:18,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-07-13 18:23:18,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528999996] [2021-07-13 18:23:18,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:23:18,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:18,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:23:18,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:23:18,389 INFO L87 Difference]: Start difference. First operand 53550 states and 142146 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:18,808 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:23:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:19,037 INFO L93 Difference]: Finished difference Result 74195 states and 195180 transitions. [2021-07-13 18:23:19,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 18:23:19,037 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-07-13 18:23:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:19,180 INFO L225 Difference]: With dead ends: 74195 [2021-07-13 18:23:19,181 INFO L226 Difference]: Without dead ends: 74195 [2021-07-13 18:23:19,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:23:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74195 states. [2021-07-13 18:23:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74195 to 54890. [2021-07-13 18:23:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54888 states have (on average 2.655644220959044) internal successors, (145763), 54889 states have internal predecessors, (145763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 145763 transitions. [2021-07-13 18:23:20,695 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 145763 transitions. Word has length 338 [2021-07-13 18:23:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:20,695 INFO L482 AbstractCegarLoop]: Abstraction has 54890 states and 145763 transitions. [2021-07-13 18:23:20,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 145763 transitions. [2021-07-13 18:23:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:23:20,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:20,780 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:20,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 18:23:20,997 INFO L430 AbstractCegarLoop]: === Iteration 30 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash -211780843, now seen corresponding path program 6 times [2021-07-13 18:23:20,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:20,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321351855] [2021-07-13 18:23:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:23:21,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:21,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321351855] [2021-07-13 18:23:21,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321351855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:21,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900948532] [2021-07-13 18:23:21,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:21,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-13 18:23:21,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:21,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:21,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:22,009 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:23:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:22,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900948532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:22,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:22,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:23:22,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340884970] [2021-07-13 18:23:22,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:23:22,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:23:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:23:22,329 INFO L87 Difference]: Start difference. First operand 54890 states and 145763 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:22,779 INFO L93 Difference]: Finished difference Result 79850 states and 210905 transitions. [2021-07-13 18:23:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:23:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-07-13 18:23:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:23,259 INFO L225 Difference]: With dead ends: 79850 [2021-07-13 18:23:23,259 INFO L226 Difference]: Without dead ends: 79850 [2021-07-13 18:23:23,260 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:23:23,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79850 states. [2021-07-13 18:23:24,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79850 to 54890. [2021-07-13 18:23:24,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54888 states have (on average 2.655644220959044) internal successors, (145763), 54889 states have internal predecessors, (145763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 145763 transitions. [2021-07-13 18:23:24,868 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 145763 transitions. Word has length 338 [2021-07-13 18:23:24,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:24,869 INFO L482 AbstractCegarLoop]: Abstraction has 54890 states and 145763 transitions. [2021-07-13 18:23:24,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:24,869 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 145763 transitions. [2021-07-13 18:23:24,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:23:24,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:24,949 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:25,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:25,166 INFO L430 AbstractCegarLoop]: === Iteration 31 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1337059721, now seen corresponding path program 7 times [2021-07-13 18:23:25,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:25,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074438449] [2021-07-13 18:23:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:23:25,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074438449] [2021-07-13 18:23:25,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074438449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247349965] [2021-07-13 18:23:25,283 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 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 [2021-07-13 18:23:25,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:25,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:25,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:25,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247349965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:25,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:25,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:23:25,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885705323] [2021-07-13 18:23:25,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:23:25,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:25,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:23:25,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:23:25,750 INFO L87 Difference]: Start difference. First operand 54890 states and 145763 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:26,361 INFO L93 Difference]: Finished difference Result 76925 states and 202929 transitions. [2021-07-13 18:23:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:23:26,362 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-07-13 18:23:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:26,513 INFO L225 Difference]: With dead ends: 76925 [2021-07-13 18:23:26,513 INFO L226 Difference]: Without dead ends: 76925 [2021-07-13 18:23:26,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=215, Invalid=597, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:23:26,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76925 states. [2021-07-13 18:23:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76925 to 56710. [2021-07-13 18:23:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56710 states, 56708 states have (on average 2.6571912252239542) internal successors, (150684), 56709 states have internal predecessors, (150684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:27,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56710 states to 56710 states and 150684 transitions. [2021-07-13 18:23:27,838 INFO L78 Accepts]: Start accepts. Automaton has 56710 states and 150684 transitions. Word has length 338 [2021-07-13 18:23:27,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:27,838 INFO L482 AbstractCegarLoop]: Abstraction has 56710 states and 150684 transitions. [2021-07-13 18:23:27,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 56710 states and 150684 transitions. [2021-07-13 18:23:27,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-07-13 18:23:27,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:27,927 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:28,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 18:23:28,143 INFO L430 AbstractCegarLoop]: === Iteration 32 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1805004757, now seen corresponding path program 8 times [2021-07-13 18:23:28,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:28,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613539013] [2021-07-13 18:23:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 599 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:23:28,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613539013] [2021-07-13 18:23:28,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613539013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:28,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009108729] [2021-07-13 18:23:28,256 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 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 [2021-07-13 18:23:28,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:28,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:28,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:28,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 18 proven. 576 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:29,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009108729] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:29,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:29,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-07-13 18:23:29,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137900029] [2021-07-13 18:23:29,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 18:23:29,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:29,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 18:23:29,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-07-13 18:23:29,011 INFO L87 Difference]: Start difference. First operand 56710 states and 150684 transitions. Second operand has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:29,420 INFO L93 Difference]: Finished difference Result 72430 states and 190479 transitions. [2021-07-13 18:23:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:23:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 338 [2021-07-13 18:23:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:29,754 INFO L225 Difference]: With dead ends: 72430 [2021-07-13 18:23:29,754 INFO L226 Difference]: Without dead ends: 72430 [2021-07-13 18:23:29,754 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:23:29,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72430 states. [2021-07-13 18:23:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72430 to 56970. [2021-07-13 18:23:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56970 states, 56968 states have (on average 2.6567020081449235) internal successors, (151347), 56969 states have internal predecessors, (151347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56970 states to 56970 states and 151347 transitions. [2021-07-13 18:23:30,941 INFO L78 Accepts]: Start accepts. Automaton has 56970 states and 151347 transitions. Word has length 338 [2021-07-13 18:23:30,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:30,942 INFO L482 AbstractCegarLoop]: Abstraction has 56970 states and 151347 transitions. [2021-07-13 18:23:30,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 21.266666666666666) internal successors, (319), 15 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 56970 states and 151347 transitions. [2021-07-13 18:23:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:23:31,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:31,417 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:31,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:31,633 INFO L430 AbstractCegarLoop]: === Iteration 33 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 608153804, now seen corresponding path program 13 times [2021-07-13 18:23:31,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:31,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120212973] [2021-07-13 18:23:31,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:31,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:31,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120212973] [2021-07-13 18:23:31,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120212973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:31,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030515266] [2021-07-13 18:23:31,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:31,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:31,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:32,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030515266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:32,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:32,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:23:32,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328423728] [2021-07-13 18:23:32,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:23:32,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:32,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:23:32,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:23:32,221 INFO L87 Difference]: Start difference. First operand 56970 states and 151347 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:32,571 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 18:23:32,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:32,838 INFO L93 Difference]: Finished difference Result 80730 states and 213255 transitions. [2021-07-13 18:23:32,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:23:32,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-07-13 18:23:32,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:32,993 INFO L225 Difference]: With dead ends: 80730 [2021-07-13 18:23:32,993 INFO L226 Difference]: Without dead ends: 80730 [2021-07-13 18:23:32,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=319, Invalid=941, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:23:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80730 states. [2021-07-13 18:23:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80730 to 56970. [2021-07-13 18:23:34,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56970 states, 56968 states have (on average 2.6567020081449235) internal successors, (151347), 56969 states have internal predecessors, (151347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:34,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56970 states to 56970 states and 151347 transitions. [2021-07-13 18:23:34,506 INFO L78 Accepts]: Start accepts. Automaton has 56970 states and 151347 transitions. Word has length 339 [2021-07-13 18:23:34,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:34,507 INFO L482 AbstractCegarLoop]: Abstraction has 56970 states and 151347 transitions. [2021-07-13 18:23:34,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:34,507 INFO L276 IsEmpty]: Start isEmpty. Operand 56970 states and 151347 transitions. [2021-07-13 18:23:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:23:34,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:34,947 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:35,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 18:23:35,185 INFO L430 AbstractCegarLoop]: === Iteration 34 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:35,185 INFO L82 PathProgramCache]: Analyzing trace with hash -676150072, now seen corresponding path program 14 times [2021-07-13 18:23:35,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:35,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976867255] [2021-07-13 18:23:35,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:35,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:35,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976867255] [2021-07-13 18:23:35,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976867255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:35,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240878891] [2021-07-13 18:23:35,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:35,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:23:35,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:35,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:35,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:36,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240878891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:36,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:36,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:23:36,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581880621] [2021-07-13 18:23:36,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:23:36,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:36,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:23:36,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:23:36,205 INFO L87 Difference]: Start difference. First operand 56970 states and 151347 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:36,834 INFO L93 Difference]: Finished difference Result 83430 states and 220365 transitions. [2021-07-13 18:23:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-07-13 18:23:36,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:36,999 INFO L225 Difference]: With dead ends: 83430 [2021-07-13 18:23:36,999 INFO L226 Difference]: Without dead ends: 83430 [2021-07-13 18:23:36,999 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 193.1ms TimeCoverageRelationStatistics Valid=310, Invalid=880, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:23:37,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83430 states. [2021-07-13 18:23:38,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83430 to 58790. [2021-07-13 18:23:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58790 states, 58788 states have (on average 2.6581615295638565) internal successors, (156268), 58789 states have internal predecessors, (156268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58790 states to 58790 states and 156268 transitions. [2021-07-13 18:23:38,626 INFO L78 Accepts]: Start accepts. Automaton has 58790 states and 156268 transitions. Word has length 339 [2021-07-13 18:23:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:38,626 INFO L482 AbstractCegarLoop]: Abstraction has 58790 states and 156268 transitions. [2021-07-13 18:23:38,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 58790 states and 156268 transitions. [2021-07-13 18:23:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:23:38,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:38,718 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:38,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:38,934 INFO L430 AbstractCegarLoop]: === Iteration 35 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:38,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:38,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1228255412, now seen corresponding path program 15 times [2021-07-13 18:23:38,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:38,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967037594] [2021-07-13 18:23:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:39,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:39,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967037594] [2021-07-13 18:23:39,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967037594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:39,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376056500] [2021-07-13 18:23:39,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:39,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:23:39,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:40,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376056500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:40,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:40,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:23:40,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330704206] [2021-07-13 18:23:40,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:23:40,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:40,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:23:40,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:23:40,090 INFO L87 Difference]: Start difference. First operand 58790 states and 156268 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:40,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:40,579 INFO L93 Difference]: Finished difference Result 86710 states and 229239 transitions. [2021-07-13 18:23:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:23:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-07-13 18:23:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:41,018 INFO L225 Difference]: With dead ends: 86710 [2021-07-13 18:23:41,018 INFO L226 Difference]: Without dead ends: 86710 [2021-07-13 18:23:41,019 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:23:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86710 states. [2021-07-13 18:23:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86710 to 60610. [2021-07-13 18:23:42,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60610 states, 60608 states have (on average 2.659533394931362) internal successors, (161189), 60609 states have internal predecessors, (161189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60610 states to 60610 states and 161189 transitions. [2021-07-13 18:23:42,685 INFO L78 Accepts]: Start accepts. Automaton has 60610 states and 161189 transitions. Word has length 339 [2021-07-13 18:23:42,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:42,685 INFO L482 AbstractCegarLoop]: Abstraction has 60610 states and 161189 transitions. [2021-07-13 18:23:42,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 60610 states and 161189 transitions. [2021-07-13 18:23:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:23:42,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:42,769 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:42,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 18:23:42,986 INFO L430 AbstractCegarLoop]: === Iteration 36 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:42,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:42,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1924164024, now seen corresponding path program 16 times [2021-07-13 18:23:42,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:42,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726655921] [2021-07-13 18:23:42,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:43,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:43,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:43,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726655921] [2021-07-13 18:23:43,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726655921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:43,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427416912] [2021-07-13 18:23:43,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:43,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:23:43,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:43,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:43,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:43,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427416912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:43,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:43,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:23:43,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775862804] [2021-07-13 18:23:43,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:23:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:43,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:23:43,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:23:43,816 INFO L87 Difference]: Start difference. First operand 60610 states and 161189 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:44,635 INFO L93 Difference]: Finished difference Result 88725 states and 234124 transitions. [2021-07-13 18:23:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:23:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-07-13 18:23:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:44,810 INFO L225 Difference]: With dead ends: 88725 [2021-07-13 18:23:44,810 INFO L226 Difference]: Without dead ends: 88725 [2021-07-13 18:23:44,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:23:45,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88725 states. [2021-07-13 18:23:46,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88725 to 67490. [2021-07-13 18:23:46,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67490 states, 67488 states have (on average 2.6655553579895686) internal successors, (179893), 67489 states have internal predecessors, (179893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67490 states to 67490 states and 179893 transitions. [2021-07-13 18:23:46,982 INFO L78 Accepts]: Start accepts. Automaton has 67490 states and 179893 transitions. Word has length 339 [2021-07-13 18:23:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:46,983 INFO L482 AbstractCegarLoop]: Abstraction has 67490 states and 179893 transitions. [2021-07-13 18:23:46,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 67490 states and 179893 transitions. [2021-07-13 18:23:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:23:47,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:47,082 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:47,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-07-13 18:23:47,299 INFO L430 AbstractCegarLoop]: === Iteration 37 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:47,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:47,300 INFO L82 PathProgramCache]: Analyzing trace with hash -128971316, now seen corresponding path program 17 times [2021-07-13 18:23:47,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:47,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37881230] [2021-07-13 18:23:47,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:47,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:47,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37881230] [2021-07-13 18:23:47,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37881230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:47,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140135440] [2021-07-13 18:23:47,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:47,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:23:47,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:47,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:47,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:48,029 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:48,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140135440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:48,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:48,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:23:48,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367762488] [2021-07-13 18:23:48,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:23:48,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:23:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:23:48,031 INFO L87 Difference]: Start difference. First operand 67490 states and 179893 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:48,861 INFO L93 Difference]: Finished difference Result 85430 states and 225749 transitions. [2021-07-13 18:23:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:23:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-07-13 18:23:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:49,026 INFO L225 Difference]: With dead ends: 85430 [2021-07-13 18:23:49,027 INFO L226 Difference]: Without dead ends: 85430 [2021-07-13 18:23:49,027 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=283, Invalid=709, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:23:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85430 states. [2021-07-13 18:23:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85430 to 71470. [2021-07-13 18:23:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71470 states, 71468 states have (on average 2.6686349135277325) internal successors, (190722), 71469 states have internal predecessors, (190722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71470 states to 71470 states and 190722 transitions. [2021-07-13 18:23:50,908 INFO L78 Accepts]: Start accepts. Automaton has 71470 states and 190722 transitions. Word has length 339 [2021-07-13 18:23:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:50,908 INFO L482 AbstractCegarLoop]: Abstraction has 71470 states and 190722 transitions. [2021-07-13 18:23:50,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 71470 states and 190722 transitions. [2021-07-13 18:23:51,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2021-07-13 18:23:51,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:51,042 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:51,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 18:23:51,258 INFO L430 AbstractCegarLoop]: === Iteration 38 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:51,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:51,259 INFO L82 PathProgramCache]: Analyzing trace with hash 18696136, now seen corresponding path program 18 times [2021-07-13 18:23:51,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:51,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803595997] [2021-07-13 18:23:51,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 828 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:23:51,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:51,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803595997] [2021-07-13 18:23:51,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803595997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:51,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654321089] [2021-07-13 18:23:51,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:23:51,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:23:51,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:51,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 18:23:51,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 21 proven. 805 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:23:52,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654321089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:52,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:52,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:23:52,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950967211] [2021-07-13 18:23:52,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:23:52,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:52,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:23:52,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:23:52,041 INFO L87 Difference]: Start difference. First operand 71470 states and 190722 transitions. Second operand has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:52,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:52,719 INFO L93 Difference]: Finished difference Result 82005 states and 217163 transitions. [2021-07-13 18:23:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:23:52,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 339 [2021-07-13 18:23:52,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:52,879 INFO L225 Difference]: With dead ends: 82005 [2021-07-13 18:23:52,880 INFO L226 Difference]: Without dead ends: 82005 [2021-07-13 18:23:52,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=338, Invalid=784, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:23:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82005 states. [2021-07-13 18:23:54,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82005 to 70390. [2021-07-13 18:23:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70390 states, 70388 states have (on average 2.6676137978064443) internal successors, (187768), 70389 states have internal predecessors, (187768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70390 states to 70390 states and 187768 transitions. [2021-07-13 18:23:54,584 INFO L78 Accepts]: Start accepts. Automaton has 70390 states and 187768 transitions. Word has length 339 [2021-07-13 18:23:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:54,584 INFO L482 AbstractCegarLoop]: Abstraction has 70390 states and 187768 transitions. [2021-07-13 18:23:54,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 19.72222222222222) internal successors, (355), 18 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 70390 states and 187768 transitions. [2021-07-13 18:23:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-07-13 18:23:55,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:55,215 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:55,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 18:23:55,432 INFO L430 AbstractCegarLoop]: === Iteration 39 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:55,433 INFO L82 PathProgramCache]: Analyzing trace with hash 165063693, now seen corresponding path program 9 times [2021-07-13 18:23:55,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:55,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928222968] [2021-07-13 18:23:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:23:55,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:55,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928222968] [2021-07-13 18:23:55,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928222968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:55,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605160229] [2021-07-13 18:23:55,609 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 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 [2021-07-13 18:23:55,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:23:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:55,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:23:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1395 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:23:56,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605160229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:56,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:23:56,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-07-13 18:23:56,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2318666] [2021-07-13 18:23:56,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-13 18:23:56,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:23:56,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-13 18:23:56,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2021-07-13 18:23:56,330 INFO L87 Difference]: Start difference. First operand 70390 states and 187768 transitions. Second operand has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:57,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:23:57,154 INFO L93 Difference]: Finished difference Result 80742 states and 214130 transitions. [2021-07-13 18:23:57,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:23:57,154 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 369 [2021-07-13 18:23:57,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:23:57,316 INFO L225 Difference]: With dead ends: 80742 [2021-07-13 18:23:57,316 INFO L226 Difference]: Without dead ends: 80742 [2021-07-13 18:23:57,317 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 280.4ms TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:23:57,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80742 states. [2021-07-13 18:23:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80742 to 73705. [2021-07-13 18:23:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73705 states, 73703 states have (on average 2.6657802260423593) internal successors, (196476), 73704 states have internal predecessors, (196476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73705 states to 73705 states and 196476 transitions. [2021-07-13 18:23:58,837 INFO L78 Accepts]: Start accepts. Automaton has 73705 states and 196476 transitions. Word has length 369 [2021-07-13 18:23:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:23:58,837 INFO L482 AbstractCegarLoop]: Abstraction has 73705 states and 196476 transitions. [2021-07-13 18:23:58,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 18.08695652173913) internal successors, (416), 23 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:23:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 73705 states and 196476 transitions. [2021-07-13 18:23:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:23:59,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:23:59,242 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:23:59,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 18:23:59,459 INFO L430 AbstractCegarLoop]: === Iteration 40 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:23:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:23:59,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1476003443, now seen corresponding path program 9 times [2021-07-13 18:23:59,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:23:59,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629889996] [2021-07-13 18:23:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:23:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:23:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:23:59,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:23:59,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629889996] [2021-07-13 18:23:59,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629889996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:23:59,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198441034] [2021-07-13 18:23:59,578 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 [2021-07-13 18:23:59,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:23:59,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:23:59,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:23:59,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:00,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198441034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:00,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:00,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:24:00,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289039832] [2021-07-13 18:24:00,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:00,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:00,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:00,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:00,295 INFO L87 Difference]: Start difference. First operand 73705 states and 196476 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:00,989 INFO L93 Difference]: Finished difference Result 96845 states and 256215 transitions. [2021-07-13 18:24:00,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:24:00,990 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:00,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:01,179 INFO L225 Difference]: With dead ends: 96845 [2021-07-13 18:24:01,180 INFO L226 Difference]: Without dead ends: 96845 [2021-07-13 18:24:01,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=255, Invalid=801, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:24:01,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96845 states. [2021-07-13 18:24:03,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96845 to 71885. [2021-07-13 18:24:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71885 states, 71883 states have (on average 2.664816437822573) internal successors, (191555), 71884 states have internal predecessors, (191555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71885 states to 71885 states and 191555 transitions. [2021-07-13 18:24:03,435 INFO L78 Accepts]: Start accepts. Automaton has 71885 states and 191555 transitions. Word has length 373 [2021-07-13 18:24:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:03,436 INFO L482 AbstractCegarLoop]: Abstraction has 71885 states and 191555 transitions. [2021-07-13 18:24:03,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 71885 states and 191555 transitions. [2021-07-13 18:24:03,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:03,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:03,554 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:03,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 18:24:03,771 INFO L430 AbstractCegarLoop]: === Iteration 41 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2061910789, now seen corresponding path program 10 times [2021-07-13 18:24:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:03,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109618420] [2021-07-13 18:24:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:03,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:03,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109618420] [2021-07-13 18:24:03,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109618420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:03,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712319551] [2021-07-13 18:24:03,896 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 [2021-07-13 18:24:04,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:24:04,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:04,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:04,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712319551] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:04,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:04,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:24:04,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145987574] [2021-07-13 18:24:04,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:04,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:04,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:04,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:04,897 INFO L87 Difference]: Start difference. First operand 71885 states and 191555 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:05,633 INFO L93 Difference]: Finished difference Result 111885 states and 296684 transitions. [2021-07-13 18:24:05,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:24:05,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:05,879 INFO L225 Difference]: With dead ends: 111885 [2021-07-13 18:24:05,879 INFO L226 Difference]: Without dead ends: 111885 [2021-07-13 18:24:05,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111885 states. [2021-07-13 18:24:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111885 to 72965. [2021-07-13 18:24:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72965 states, 72963 states have (on average 2.665858037635514) internal successors, (194509), 72964 states have internal predecessors, (194509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72965 states to 72965 states and 194509 transitions. [2021-07-13 18:24:08,233 INFO L78 Accepts]: Start accepts. Automaton has 72965 states and 194509 transitions. Word has length 373 [2021-07-13 18:24:08,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:08,234 INFO L482 AbstractCegarLoop]: Abstraction has 72965 states and 194509 transitions. [2021-07-13 18:24:08,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:08,234 INFO L276 IsEmpty]: Start isEmpty. Operand 72965 states and 194509 transitions. [2021-07-13 18:24:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:08,396 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:08,396 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:08,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-07-13 18:24:08,613 INFO L430 AbstractCegarLoop]: === Iteration 42 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:08,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:08,613 INFO L82 PathProgramCache]: Analyzing trace with hash 936631911, now seen corresponding path program 11 times [2021-07-13 18:24:08,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:08,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152014254] [2021-07-13 18:24:08,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:08,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152014254] [2021-07-13 18:24:08,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152014254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:08,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120145436] [2021-07-13 18:24:08,731 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 [2021-07-13 18:24:09,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:24:09,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:09,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:09,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:09,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120145436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:09,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:09,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:24:09,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433826116] [2021-07-13 18:24:09,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:09,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:09,488 INFO L87 Difference]: Start difference. First operand 72965 states and 194509 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:10,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:10,386 INFO L93 Difference]: Finished difference Result 99130 states and 261670 transitions. [2021-07-13 18:24:10,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:24:10,387 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:10,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:10,614 INFO L225 Difference]: With dead ends: 99130 [2021-07-13 18:24:10,614 INFO L226 Difference]: Without dead ends: 99130 [2021-07-13 18:24:10,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99130 states. [2021-07-13 18:24:12,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99130 to 76125. [2021-07-13 18:24:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-07-13 18:24:13,170 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-07-13 18:24:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:13,171 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-07-13 18:24:13,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-07-13 18:24:13,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:13,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:13,293 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:13,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:13,509 INFO L430 AbstractCegarLoop]: === Iteration 43 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:13,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:13,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1086047885, now seen corresponding path program 12 times [2021-07-13 18:24:13,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:13,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741450666] [2021-07-13 18:24:13,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:13,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:13,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741450666] [2021-07-13 18:24:13,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741450666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:13,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474730408] [2021-07-13 18:24:13,627 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 [2021-07-13 18:24:13,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:24:13,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:13,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:14,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474730408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:14,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:14,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:24:14,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491057525] [2021-07-13 18:24:14,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:14,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:14,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:14,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:14,782 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:15,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:15,665 INFO L93 Difference]: Finished difference Result 115565 states and 306636 transitions. [2021-07-13 18:24:15,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 18:24:15,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:15,922 INFO L225 Difference]: With dead ends: 115565 [2021-07-13 18:24:15,922 INFO L226 Difference]: Without dead ends: 115565 [2021-07-13 18:24:15,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:24:16,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115565 states. [2021-07-13 18:24:17,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115565 to 77205. [2021-07-13 18:24:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77205 states, 77203 states have (on average 2.66830304521845) internal successors, (206001), 77204 states have internal predecessors, (206001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77205 states to 77205 states and 206001 transitions. [2021-07-13 18:24:18,708 INFO L78 Accepts]: Start accepts. Automaton has 77205 states and 206001 transitions. Word has length 373 [2021-07-13 18:24:18,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:18,709 INFO L482 AbstractCegarLoop]: Abstraction has 77205 states and 206001 transitions. [2021-07-13 18:24:18,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 77205 states and 206001 transitions. [2021-07-13 18:24:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:18,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:18,838 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:19,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:19,056 INFO L430 AbstractCegarLoop]: === Iteration 44 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:19,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash -39230993, now seen corresponding path program 13 times [2021-07-13 18:24:19,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:19,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927502810] [2021-07-13 18:24:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:19,289 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:19,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:19,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927502810] [2021-07-13 18:24:19,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927502810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:19,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798716000] [2021-07-13 18:24:19,290 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 [2021-07-13 18:24:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:19,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:19,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:19,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798716000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:19,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:19,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:24:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667779235] [2021-07-13 18:24:19,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:19,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:19,846 INFO L87 Difference]: Start difference. First operand 77205 states and 206001 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:20,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:20,621 INFO L93 Difference]: Finished difference Result 115715 states and 307239 transitions. [2021-07-13 18:24:20,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:24:20,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:20,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:20,878 INFO L225 Difference]: With dead ends: 115715 [2021-07-13 18:24:20,879 INFO L226 Difference]: Without dead ends: 115715 [2021-07-13 18:24:20,880 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:24:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115715 states. [2021-07-13 18:24:22,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115715 to 79025. [2021-07-13 18:24:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79025 states, 79023 states have (on average 2.6691216481277604) internal successors, (210922), 79024 states have internal predecessors, (210922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79025 states to 79025 states and 210922 transitions. [2021-07-13 18:24:23,138 INFO L78 Accepts]: Start accepts. Automaton has 79025 states and 210922 transitions. Word has length 373 [2021-07-13 18:24:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:23,139 INFO L482 AbstractCegarLoop]: Abstraction has 79025 states and 210922 transitions. [2021-07-13 18:24:23,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 79025 states and 210922 transitions. [2021-07-13 18:24:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:23,262 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:23,262 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:23,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:23,479 INFO L430 AbstractCegarLoop]: === Iteration 45 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1192133811, now seen corresponding path program 14 times [2021-07-13 18:24:23,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:23,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138985601] [2021-07-13 18:24:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:23,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:23,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138985601] [2021-07-13 18:24:23,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138985601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:23,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696921416] [2021-07-13 18:24:23,948 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 [2021-07-13 18:24:24,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:24:24,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:24,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:24,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:24,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696921416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:24,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:24,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-07-13 18:24:24,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98773645] [2021-07-13 18:24:24,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:24,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:24,509 INFO L87 Difference]: Start difference. First operand 79025 states and 210922 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:25,201 INFO L93 Difference]: Finished difference Result 100250 states and 264700 transitions. [2021-07-13 18:24:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 18:24:25,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:25,431 INFO L225 Difference]: With dead ends: 100250 [2021-07-13 18:24:25,432 INFO L226 Difference]: Without dead ends: 100250 [2021-07-13 18:24:25,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-07-13 18:24:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100250 states. [2021-07-13 18:24:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100250 to 76125. [2021-07-13 18:24:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-07-13 18:24:27,651 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-07-13 18:24:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:27,652 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-07-13 18:24:27,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-07-13 18:24:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:27,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:27,930 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:28,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 18:24:28,145 INFO L430 AbstractCegarLoop]: === Iteration 46 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:28,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1580553733, now seen corresponding path program 15 times [2021-07-13 18:24:28,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:28,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124449357] [2021-07-13 18:24:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:28,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:28,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124449357] [2021-07-13 18:24:28,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124449357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:28,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032160418] [2021-07-13 18:24:28,377 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 [2021-07-13 18:24:28,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:24:28,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:28,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:28,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:29,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032160418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:29,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:29,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:24:29,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231175539] [2021-07-13 18:24:29,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:29,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:29,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:29,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:29,092 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:29,410 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:24:29,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:29,871 INFO L93 Difference]: Finished difference Result 108675 states and 288358 transitions. [2021-07-13 18:24:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:24:29,872 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:29,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:30,109 INFO L225 Difference]: With dead ends: 108675 [2021-07-13 18:24:30,124 INFO L226 Difference]: Without dead ends: 108675 [2021-07-13 18:24:30,125 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 407.1ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:24:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108675 states. [2021-07-13 18:24:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108675 to 76125. [2021-07-13 18:24:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76125 states, 76123 states have (on average 2.6673541505195537) internal successors, (203047), 76124 states have internal predecessors, (203047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:32,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76125 states to 76125 states and 203047 transitions. [2021-07-13 18:24:32,616 INFO L78 Accepts]: Start accepts. Automaton has 76125 states and 203047 transitions. Word has length 373 [2021-07-13 18:24:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:32,616 INFO L482 AbstractCegarLoop]: Abstraction has 76125 states and 203047 transitions. [2021-07-13 18:24:32,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:32,617 INFO L276 IsEmpty]: Start isEmpty. Operand 76125 states and 203047 transitions. [2021-07-13 18:24:32,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:32,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:32,733 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:32,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:32,949 INFO L430 AbstractCegarLoop]: === Iteration 47 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 455274855, now seen corresponding path program 16 times [2021-07-13 18:24:32,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:32,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303786022] [2021-07-13 18:24:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:33,694 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:33,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303786022] [2021-07-13 18:24:33,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303786022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:33,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799075306] [2021-07-13 18:24:33,694 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 [2021-07-13 18:24:33,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:24:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:33,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:33,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:34,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799075306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:34,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:34,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:24:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124866158] [2021-07-13 18:24:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:34,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:34,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:34,368 INFO L87 Difference]: Start difference. First operand 76125 states and 203047 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:35,211 INFO L93 Difference]: Finished difference Result 110765 states and 293455 transitions. [2021-07-13 18:24:35,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:24:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:35,457 INFO L225 Difference]: With dead ends: 110765 [2021-07-13 18:24:35,458 INFO L226 Difference]: Without dead ends: 110765 [2021-07-13 18:24:35,458 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 180.6ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:24:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110765 states. [2021-07-13 18:24:36,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110765 to 75045. [2021-07-13 18:24:37,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75045 states, 75043 states have (on average 2.6663779433125008) internal successors, (200093), 75044 states have internal predecessors, (200093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75045 states to 75045 states and 200093 transitions. [2021-07-13 18:24:37,455 INFO L78 Accepts]: Start accepts. Automaton has 75045 states and 200093 transitions. Word has length 373 [2021-07-13 18:24:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:37,455 INFO L482 AbstractCegarLoop]: Abstraction has 75045 states and 200093 transitions. [2021-07-13 18:24:37,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 75045 states and 200093 transitions. [2021-07-13 18:24:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:37,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:37,571 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:37,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:37,788 INFO L430 AbstractCegarLoop]: === Iteration 48 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:37,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:37,788 INFO L82 PathProgramCache]: Analyzing trace with hash -697627963, now seen corresponding path program 17 times [2021-07-13 18:24:37,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:37,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994224093] [2021-07-13 18:24:37,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:37,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994224093] [2021-07-13 18:24:37,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994224093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:37,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836711192] [2021-07-13 18:24:37,915 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 [2021-07-13 18:24:38,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-13 18:24:38,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:38,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836711192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:38,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:38,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:24:38,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015585596] [2021-07-13 18:24:38,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:38,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:38,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:38,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:38,563 INFO L87 Difference]: Start difference. First operand 75045 states and 200093 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:39,351 INFO L93 Difference]: Finished difference Result 108165 states and 286375 transitions. [2021-07-13 18:24:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:24:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:39,593 INFO L225 Difference]: With dead ends: 108165 [2021-07-13 18:24:39,593 INFO L226 Difference]: Without dead ends: 108165 [2021-07-13 18:24:39,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:24:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108165 states. [2021-07-13 18:24:41,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108165 to 78685. [2021-07-13 18:24:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78685 states, 78683 states have (on average 2.668111281979589) internal successors, (209935), 78684 states have internal predecessors, (209935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:41,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78685 states to 78685 states and 209935 transitions. [2021-07-13 18:24:41,577 INFO L78 Accepts]: Start accepts. Automaton has 78685 states and 209935 transitions. Word has length 373 [2021-07-13 18:24:41,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:41,578 INFO L482 AbstractCegarLoop]: Abstraction has 78685 states and 209935 transitions. [2021-07-13 18:24:41,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:41,578 INFO L276 IsEmpty]: Start isEmpty. Operand 78685 states and 209935 transitions. [2021-07-13 18:24:41,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-07-13 18:24:41,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:41,701 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:41,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 18:24:41,918 INFO L430 AbstractCegarLoop]: === Iteration 49 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:41,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:41,918 INFO L82 PathProgramCache]: Analyzing trace with hash -237304665, now seen corresponding path program 18 times [2021-07-13 18:24:41,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:41,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598934278] [2021-07-13 18:24:41,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 824 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:24:42,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:42,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598934278] [2021-07-13 18:24:42,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598934278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:42,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715075290] [2021-07-13 18:24:42,621 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 [2021-07-13 18:24:42,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-13 18:24:42,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:42,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 721 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:42,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 21 proven. 801 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:24:43,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715075290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:43,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:43,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:24:43,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633399946] [2021-07-13 18:24:43,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:24:43,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:43,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:24:43,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:24:43,249 INFO L87 Difference]: Start difference. First operand 78685 states and 209935 transitions. Second operand has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:44,205 INFO L93 Difference]: Finished difference Result 100025 states and 264232 transitions. [2021-07-13 18:24:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:24:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 373 [2021-07-13 18:24:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:44,422 INFO L225 Difference]: With dead ends: 100025 [2021-07-13 18:24:44,422 INFO L226 Difference]: Without dead ends: 100025 [2021-07-13 18:24:44,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 205.0ms TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 18:24:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100025 states. [2021-07-13 18:24:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100025 to 82925. [2021-07-13 18:24:46,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-07-13 18:24:46,824 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 373 [2021-07-13 18:24:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:46,825 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-07-13 18:24:46,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 20.823529411764707) internal successors, (354), 17 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-07-13 18:24:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:24:46,954 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:46,956 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:47,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 18:24:47,169 INFO L430 AbstractCegarLoop]: === Iteration 50 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:47,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:47,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2108828588, now seen corresponding path program 19 times [2021-07-13 18:24:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:47,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686513646] [2021-07-13 18:24:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:47,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:47,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686513646] [2021-07-13 18:24:47,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686513646] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:47,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106933180] [2021-07-13 18:24:47,353 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 [2021-07-13 18:24:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:47,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:47,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:48,013 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:24:48,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:48,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106933180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:48,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:48,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:48,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376140966] [2021-07-13 18:24:48,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:48,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:48,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:48,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:48,205 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:49,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:49,045 INFO L93 Difference]: Finished difference Result 106480 states and 282217 transitions. [2021-07-13 18:24:49,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:24:49,046 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-07-13 18:24:49,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:49,278 INFO L225 Difference]: With dead ends: 106480 [2021-07-13 18:24:49,279 INFO L226 Difference]: Without dead ends: 106480 [2021-07-13 18:24:49,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:24:49,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106480 states. [2021-07-13 18:24:50,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106480 to 82925. [2021-07-13 18:24:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:51,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-07-13 18:24:51,525 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 374 [2021-07-13 18:24:51,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:51,525 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-07-13 18:24:51,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-07-13 18:24:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:24:51,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:51,669 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:51,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 18:24:51,881 INFO L430 AbstractCegarLoop]: === Iteration 51 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:51,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:51,881 INFO L82 PathProgramCache]: Analyzing trace with hash 901834832, now seen corresponding path program 20 times [2021-07-13 18:24:51,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:51,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529435999] [2021-07-13 18:24:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:52,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:52,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:52,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529435999] [2021-07-13 18:24:52,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529435999] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:52,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104812686] [2021-07-13 18:24:52,022 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 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 [2021-07-13 18:24:52,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:24:52,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:52,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104812686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:52,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:52,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:52,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017055097] [2021-07-13 18:24:52,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:52,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:52,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:52,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:52,535 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:53,559 INFO L93 Difference]: Finished difference Result 109145 states and 289012 transitions. [2021-07-13 18:24:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:24:53,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-07-13 18:24:53,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:54,160 INFO L225 Difference]: With dead ends: 109145 [2021-07-13 18:24:54,160 INFO L226 Difference]: Without dead ends: 109145 [2021-07-13 18:24:54,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:24:54,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109145 states. [2021-07-13 18:24:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109145 to 82925. [2021-07-13 18:24:56,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82925 states, 82923 states have (on average 2.6702724214029883) internal successors, (221427), 82924 states have internal predecessors, (221427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:56,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82925 states to 82925 states and 221427 transitions. [2021-07-13 18:24:56,214 INFO L78 Accepts]: Start accepts. Automaton has 82925 states and 221427 transitions. Word has length 374 [2021-07-13 18:24:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:24:56,214 INFO L482 AbstractCegarLoop]: Abstraction has 82925 states and 221427 transitions. [2021-07-13 18:24:56,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 82925 states and 221427 transitions. [2021-07-13 18:24:56,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:24:56,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:24:56,922 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:24:57,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:24:57,122 INFO L430 AbstractCegarLoop]: === Iteration 52 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:24:57,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:24:57,123 INFO L82 PathProgramCache]: Analyzing trace with hash 349729492, now seen corresponding path program 21 times [2021-07-13 18:24:57,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:24:57,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440229404] [2021-07-13 18:24:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:24:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:24:57,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:57,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:24:57,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440229404] [2021-07-13 18:24:57,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440229404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:57,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146000527] [2021-07-13 18:24:57,265 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 [2021-07-13 18:24:57,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:24:57,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:24:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:24:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:24:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:24:57,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146000527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:24:57,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:24:57,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:24:57,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638951325] [2021-07-13 18:24:57,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:24:57,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:24:57,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:24:57,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:24:57,901 INFO L87 Difference]: Start difference. First operand 82925 states and 221427 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:24:58,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:24:58,820 INFO L93 Difference]: Finished difference Result 111730 states and 295808 transitions. [2021-07-13 18:24:58,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:24:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-07-13 18:24:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:24:59,072 INFO L225 Difference]: With dead ends: 111730 [2021-07-13 18:24:59,072 INFO L226 Difference]: Without dead ends: 111730 [2021-07-13 18:24:59,072 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:24:59,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111730 states. [2021-07-13 18:25:01,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111730 to 84745. [2021-07-13 18:25:01,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84745 states, 84743 states have (on average 2.670993474387265) internal successors, (226348), 84744 states have internal predecessors, (226348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:01,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84745 states to 84745 states and 226348 transitions. [2021-07-13 18:25:01,430 INFO L78 Accepts]: Start accepts. Automaton has 84745 states and 226348 transitions. Word has length 374 [2021-07-13 18:25:01,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:01,431 INFO L482 AbstractCegarLoop]: Abstraction has 84745 states and 226348 transitions. [2021-07-13 18:25:01,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:01,431 INFO L276 IsEmpty]: Start isEmpty. Operand 84745 states and 226348 transitions. [2021-07-13 18:25:01,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:25:01,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:01,563 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:01,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:01,776 INFO L430 AbstractCegarLoop]: === Iteration 53 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:01,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:01,776 INFO L82 PathProgramCache]: Analyzing trace with hash -346179120, now seen corresponding path program 22 times [2021-07-13 18:25:01,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:01,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954077240] [2021-07-13 18:25:01,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:25:02,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954077240] [2021-07-13 18:25:02,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954077240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:02,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235209036] [2021-07-13 18:25:02,532 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 [2021-07-13 18:25:03,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:03,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:03,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:25:03,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:25:03,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235209036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:03,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:03,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:25:03,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648040693] [2021-07-13 18:25:03,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:25:03,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:03,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:25:03,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:25:03,397 INFO L87 Difference]: Start difference. First operand 84745 states and 226348 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:04,298 INFO L93 Difference]: Finished difference Result 111965 states and 296607 transitions. [2021-07-13 18:25:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:25:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-07-13 18:25:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:04,553 INFO L225 Difference]: With dead ends: 111965 [2021-07-13 18:25:04,553 INFO L226 Difference]: Without dead ends: 111965 [2021-07-13 18:25:04,553 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 818.1ms TimeCoverageRelationStatistics Valid=382, Invalid=1024, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:25:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111965 states. [2021-07-13 18:25:06,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111965 to 88725. [2021-07-13 18:25:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88725 states, 88723 states have (on average 2.6732301657969186) internal successors, (237177), 88724 states have internal predecessors, (237177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88725 states to 88725 states and 237177 transitions. [2021-07-13 18:25:07,129 INFO L78 Accepts]: Start accepts. Automaton has 88725 states and 237177 transitions. Word has length 374 [2021-07-13 18:25:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:07,129 INFO L482 AbstractCegarLoop]: Abstraction has 88725 states and 237177 transitions. [2021-07-13 18:25:07,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 88725 states and 237177 transitions. [2021-07-13 18:25:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:25:07,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:07,277 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:07,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-13 18:25:07,493 INFO L430 AbstractCegarLoop]: === Iteration 54 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:07,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:07,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1449013588, now seen corresponding path program 23 times [2021-07-13 18:25:07,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:07,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180061892] [2021-07-13 18:25:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:07,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:25:07,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:07,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180061892] [2021-07-13 18:25:07,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180061892] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:07,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425895413] [2021-07-13 18:25:07,638 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 [2021-07-13 18:25:08,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:25:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:08,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:25:08,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:08,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:25:08,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425895413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:08,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:08,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:25:08,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969924563] [2021-07-13 18:25:08,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:25:08,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:08,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:25:08,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:25:08,830 INFO L87 Difference]: Start difference. First operand 88725 states and 237177 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:09,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:09,727 INFO L93 Difference]: Finished difference Result 113460 states and 300078 transitions. [2021-07-13 18:25:09,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:25:09,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-07-13 18:25:09,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:09,985 INFO L225 Difference]: With dead ends: 113460 [2021-07-13 18:25:09,985 INFO L226 Difference]: Without dead ends: 113460 [2021-07-13 18:25:09,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=372, Invalid=960, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:25:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113460 states. [2021-07-13 18:25:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113460 to 91625. [2021-07-13 18:25:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-07-13 18:25:12,554 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-07-13 18:25:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:12,554 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-07-13 18:25:12,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-07-13 18:25:12,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:25:12,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:12,694 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:12,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:12,911 INFO L430 AbstractCegarLoop]: === Iteration 55 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:12,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:12,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1596681040, now seen corresponding path program 24 times [2021-07-13 18:25:12,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:12,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61888078] [2021-07-13 18:25:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:25:13,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:13,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61888078] [2021-07-13 18:25:13,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61888078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:13,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353959304] [2021-07-13 18:25:13,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 18:25:13,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:25:13,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:13,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:25:13,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:25:14,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353959304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:14,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:14,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:25:14,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361680292] [2021-07-13 18:25:14,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:25:14,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:14,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:25:14,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:25:14,118 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:14,832 INFO L93 Difference]: Finished difference Result 109560 states and 290274 transitions. [2021-07-13 18:25:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:25:14,832 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-07-13 18:25:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:15,068 INFO L225 Difference]: With dead ends: 109560 [2021-07-13 18:25:15,069 INFO L226 Difference]: Without dead ends: 109560 [2021-07-13 18:25:15,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:25:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109560 states. [2021-07-13 18:25:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109560 to 91625. [2021-07-13 18:25:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91625 states, 91623 states have (on average 2.674568612684588) internal successors, (245052), 91624 states have internal predecessors, (245052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91625 states to 91625 states and 245052 transitions. [2021-07-13 18:25:17,529 INFO L78 Accepts]: Start accepts. Automaton has 91625 states and 245052 transitions. Word has length 374 [2021-07-13 18:25:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:17,530 INFO L482 AbstractCegarLoop]: Abstraction has 91625 states and 245052 transitions. [2021-07-13 18:25:17,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:17,530 INFO L276 IsEmpty]: Start isEmpty. Operand 91625 states and 245052 transitions. [2021-07-13 18:25:17,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2021-07-13 18:25:17,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:17,673 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:17,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 18:25:17,890 INFO L430 AbstractCegarLoop]: === Iteration 56 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:17,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:17,891 INFO L82 PathProgramCache]: Analyzing trace with hash -49868844, now seen corresponding path program 25 times [2021-07-13 18:25:17,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:17,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937938667] [2021-07-13 18:25:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:17,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1088 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:25:18,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:18,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937938667] [2021-07-13 18:25:18,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937938667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:18,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838702127] [2021-07-13 18:25:18,089 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 [2021-07-13 18:25:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:18,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-13 18:25:18,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1124 backedges. 24 proven. 1065 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:25:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838702127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:18,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 20 [2021-07-13 18:25:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387352461] [2021-07-13 18:25:18,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:25:18,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:18,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:25:18,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:25:18,963 INFO L87 Difference]: Start difference. First operand 91625 states and 245052 transitions. Second operand has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:19,821 INFO L93 Difference]: Finished difference Result 104450 states and 277305 transitions. [2021-07-13 18:25:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:25:19,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 374 [2021-07-13 18:25:19,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:20,050 INFO L225 Difference]: With dead ends: 104450 [2021-07-13 18:25:20,050 INFO L226 Difference]: Without dead ends: 104450 [2021-07-13 18:25:20,051 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 225.1ms TimeCoverageRelationStatistics Valid=425, Invalid=981, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:25:20,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104450 states. [2021-07-13 18:25:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104450 to 89465. [2021-07-13 18:25:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89465 states, 89463 states have (on average 2.6731050825480924) internal successors, (239144), 89464 states have internal predecessors, (239144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89465 states to 89465 states and 239144 transitions. [2021-07-13 18:25:22,628 INFO L78 Accepts]: Start accepts. Automaton has 89465 states and 239144 transitions. Word has length 374 [2021-07-13 18:25:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:22,629 INFO L482 AbstractCegarLoop]: Abstraction has 89465 states and 239144 transitions. [2021-07-13 18:25:22,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 19.5) internal successors, (390), 20 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 89465 states and 239144 transitions. [2021-07-13 18:25:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2021-07-13 18:25:22,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:22,773 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:22,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-07-13 18:25:22,989 INFO L430 AbstractCegarLoop]: === Iteration 57 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1195549329, now seen corresponding path program 10 times [2021-07-13 18:25:22,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:22,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644742434] [2021-07-13 18:25:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:23,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:23,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644742434] [2021-07-13 18:25:23,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644742434] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:23,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937929938] [2021-07-13 18:25:23,185 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 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 [2021-07-13 18:25:23,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:23,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:23,916 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:25:24,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:25:24,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937929938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:24,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:24,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-07-13 18:25:24,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28045151] [2021-07-13 18:25:24,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-13 18:25:24,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:24,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-13 18:25:24,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2021-07-13 18:25:24,235 INFO L87 Difference]: Start difference. First operand 89465 states and 239144 transitions. Second operand has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:25,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:25,041 INFO L93 Difference]: Finished difference Result 101502 states and 269889 transitions. [2021-07-13 18:25:25,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:25:25,041 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 404 [2021-07-13 18:25:25,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:25,264 INFO L225 Difference]: With dead ends: 101502 [2021-07-13 18:25:25,264 INFO L226 Difference]: Without dead ends: 101502 [2021-07-13 18:25:25,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=631, Invalid=1349, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:25:25,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101502 states. [2021-07-13 18:25:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101502 to 93860. [2021-07-13 18:25:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93860 states, 93858 states have (on average 2.6721856421402546) internal successors, (250806), 93859 states have internal predecessors, (250806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93860 states to 93860 states and 250806 transitions. [2021-07-13 18:25:27,489 INFO L78 Accepts]: Start accepts. Automaton has 93860 states and 250806 transitions. Word has length 404 [2021-07-13 18:25:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:27,489 INFO L482 AbstractCegarLoop]: Abstraction has 93860 states and 250806 transitions. [2021-07-13 18:25:27,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 93860 states and 250806 transitions. [2021-07-13 18:25:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:25:27,644 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:27,644 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:27,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 18:25:27,862 INFO L430 AbstractCegarLoop]: === Iteration 58 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 138077518, now seen corresponding path program 19 times [2021-07-13 18:25:27,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:27,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865330429] [2021-07-13 18:25:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:25:27,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:27,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865330429] [2021-07-13 18:25:27,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865330429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:27,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153029229] [2021-07-13 18:25:27,978 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 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 [2021-07-13 18:25:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:28,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:25:28,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153029229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:28,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:28,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-07-13 18:25:28,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579647265] [2021-07-13 18:25:28,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:25:28,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:25:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:25:28,809 INFO L87 Difference]: Start difference. First operand 93860 states and 250806 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:29,615 INFO L93 Difference]: Finished difference Result 142070 states and 376080 transitions. [2021-07-13 18:25:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 18:25:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-07-13 18:25:29,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:29,930 INFO L225 Difference]: With dead ends: 142070 [2021-07-13 18:25:29,930 INFO L226 Difference]: Without dead ends: 142070 [2021-07-13 18:25:29,930 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2021-07-13 18:25:30,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142070 states. [2021-07-13 18:25:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142070 to 90700. [2021-07-13 18:25:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90700 states, 90698 states have (on average 2.671150411254934) internal successors, (242268), 90699 states have internal predecessors, (242268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90700 states to 90700 states and 242268 transitions. [2021-07-13 18:25:33,187 INFO L78 Accepts]: Start accepts. Automaton has 90700 states and 242268 transitions. Word has length 407 [2021-07-13 18:25:33,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:33,187 INFO L482 AbstractCegarLoop]: Abstraction has 90700 states and 242268 transitions. [2021-07-13 18:25:33,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 90700 states and 242268 transitions. [2021-07-13 18:25:33,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:25:33,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:33,338 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:33,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 18:25:33,555 INFO L430 AbstractCegarLoop]: === Iteration 59 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:33,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:33,555 INFO L82 PathProgramCache]: Analyzing trace with hash -802515258, now seen corresponding path program 20 times [2021-07-13 18:25:33,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:33,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236533251] [2021-07-13 18:25:33,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:25:33,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:33,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236533251] [2021-07-13 18:25:33,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236533251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:33,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912579032] [2021-07-13 18:25:33,685 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 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 [2021-07-13 18:25:33,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:25:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:33,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:33,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:34,596 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:25:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:25:34,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912579032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:34,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:34,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:25:34,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600328927] [2021-07-13 18:25:34,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:25:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:34,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:25:34,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:25:34,633 INFO L87 Difference]: Start difference. First operand 90700 states and 242268 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:35,255 INFO L93 Difference]: Finished difference Result 125225 states and 331936 transitions. [2021-07-13 18:25:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:25:35,256 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-07-13 18:25:35,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:35,900 INFO L225 Difference]: With dead ends: 125225 [2021-07-13 18:25:35,901 INFO L226 Difference]: Without dead ends: 125225 [2021-07-13 18:25:35,901 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:25:36,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125225 states. [2021-07-13 18:25:38,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125225 to 92520. [2021-07-13 18:25:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92520 states, 92518 states have (on average 2.67179359692168) internal successors, (247189), 92519 states have internal predecessors, (247189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92520 states to 92520 states and 247189 transitions. [2021-07-13 18:25:38,538 INFO L78 Accepts]: Start accepts. Automaton has 92520 states and 247189 transitions. Word has length 407 [2021-07-13 18:25:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:38,538 INFO L482 AbstractCegarLoop]: Abstraction has 92520 states and 247189 transitions. [2021-07-13 18:25:38,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 92520 states and 247189 transitions. [2021-07-13 18:25:38,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:25:38,682 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:38,682 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:38,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:38,897 INFO L430 AbstractCegarLoop]: === Iteration 60 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1233476004, now seen corresponding path program 21 times [2021-07-13 18:25:38,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:38,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087011973] [2021-07-13 18:25:38,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:25:39,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087011973] [2021-07-13 18:25:39,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087011973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:39,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977171498] [2021-07-13 18:25:39,452 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 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 [2021-07-13 18:25:39,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-13 18:25:39,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:25:40,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977171498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:40,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:40,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:25:40,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315205520] [2021-07-13 18:25:40,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:25:40,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:40,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:25:40,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:25:40,187 INFO L87 Difference]: Start difference. First operand 92520 states and 247189 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:41,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:41,154 INFO L93 Difference]: Finished difference Result 130760 states and 346823 transitions. [2021-07-13 18:25:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:25:41,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-07-13 18:25:41,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:41,444 INFO L225 Difference]: With dead ends: 130760 [2021-07-13 18:25:41,445 INFO L226 Difference]: Without dead ends: 130760 [2021-07-13 18:25:41,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:25:41,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130760 states. [2021-07-13 18:25:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130760 to 94680. [2021-07-13 18:25:43,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94680 states, 94678 states have (on average 2.6732398234014236) internal successors, (253097), 94679 states have internal predecessors, (253097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:44,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94680 states to 94680 states and 253097 transitions. [2021-07-13 18:25:44,422 INFO L78 Accepts]: Start accepts. Automaton has 94680 states and 253097 transitions. Word has length 407 [2021-07-13 18:25:44,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:44,422 INFO L482 AbstractCegarLoop]: Abstraction has 94680 states and 253097 transitions. [2021-07-13 18:25:44,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:44,423 INFO L276 IsEmpty]: Start isEmpty. Operand 94680 states and 253097 transitions. [2021-07-13 18:25:44,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2021-07-13 18:25:44,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:44,571 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:44,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 18:25:44,788 INFO L430 AbstractCegarLoop]: === Iteration 61 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash 108197126, now seen corresponding path program 22 times [2021-07-13 18:25:44,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:44,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968761499] [2021-07-13 18:25:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 854 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:25:44,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:44,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968761499] [2021-07-13 18:25:44,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968761499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:44,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508976227] [2021-07-13 18:25:44,914 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 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 [2021-07-13 18:25:45,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:25:45,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:45,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:45,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 21 proven. 831 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:25:45,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508976227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:45,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:45,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-07-13 18:25:45,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425432119] [2021-07-13 18:25:45,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 18:25:45,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 18:25:45,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 18:25:45,902 INFO L87 Difference]: Start difference. First operand 94680 states and 253097 transitions. Second operand has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:46,724 INFO L93 Difference]: Finished difference Result 131870 states and 349283 transitions. [2021-07-13 18:25:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:25:46,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2021-07-13 18:25:46,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:47,024 INFO L225 Difference]: With dead ends: 131870 [2021-07-13 18:25:47,024 INFO L226 Difference]: Without dead ends: 131870 [2021-07-13 18:25:47,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-07-13 18:25:47,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131870 states. [2021-07-13 18:25:49,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131870 to 102420. [2021-07-13 18:25:49,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102420 states, 102418 states have (on average 2.676424066082134) internal successors, (274114), 102419 states have internal predecessors, (274114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102420 states to 102420 states and 274114 transitions. [2021-07-13 18:25:49,702 INFO L78 Accepts]: Start accepts. Automaton has 102420 states and 274114 transitions. Word has length 407 [2021-07-13 18:25:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:49,703 INFO L482 AbstractCegarLoop]: Abstraction has 102420 states and 274114 transitions. [2021-07-13 18:25:49,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 22.0625) internal successors, (353), 16 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 102420 states and 274114 transitions. [2021-07-13 18:25:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:49,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:49,887 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:50,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:25:50,105 INFO L430 AbstractCegarLoop]: === Iteration 62 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:50,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:50,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1206991637, now seen corresponding path program 23 times [2021-07-13 18:25:50,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:50,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917482735] [2021-07-13 18:25:50,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:50,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:50,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:50,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917482735] [2021-07-13 18:25:50,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917482735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:50,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712813377] [2021-07-13 18:25:50,628 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 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 [2021-07-13 18:25:51,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:25:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:51,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:51,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712813377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:51,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:51,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:51,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523908761] [2021-07-13 18:25:51,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:51,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:51,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:51,453 INFO L87 Difference]: Start difference. First operand 102420 states and 274114 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:52,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:52,261 INFO L93 Difference]: Finished difference Result 135700 states and 360529 transitions. [2021-07-13 18:25:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:25:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:25:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:52,563 INFO L225 Difference]: With dead ends: 135700 [2021-07-13 18:25:52,563 INFO L226 Difference]: Without dead ends: 135700 [2021-07-13 18:25:52,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:25:53,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135700 states. [2021-07-13 18:25:55,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135700 to 98780. [2021-07-13 18:25:55,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98780 states, 98778 states have (on average 2.675413553625301) internal successors, (264272), 98779 states have internal predecessors, (264272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:55,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98780 states to 98780 states and 264272 transitions. [2021-07-13 18:25:55,864 INFO L78 Accepts]: Start accepts. Automaton has 98780 states and 264272 transitions. Word has length 408 [2021-07-13 18:25:55,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:25:55,865 INFO L482 AbstractCegarLoop]: Abstraction has 98780 states and 264272 transitions. [2021-07-13 18:25:55,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:55,865 INFO L276 IsEmpty]: Start isEmpty. Operand 98780 states and 264272 transitions. [2021-07-13 18:25:56,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:25:56,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:25:56,013 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:25:56,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-07-13 18:25:56,231 INFO L430 AbstractCegarLoop]: === Iteration 63 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:25:56,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:25:56,231 INFO L82 PathProgramCache]: Analyzing trace with hash 449938573, now seen corresponding path program 24 times [2021-07-13 18:25:56,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:25:56,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785160849] [2021-07-13 18:25:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:25:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:25:56,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:56,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:25:56,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785160849] [2021-07-13 18:25:56,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785160849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:56,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731297200] [2021-07-13 18:25:56,367 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 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 [2021-07-13 18:25:56,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:25:56,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:25:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:25:56,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:25:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:25:57,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731297200] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:25:57,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:25:57,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:25:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189229526] [2021-07-13 18:25:57,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:25:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:25:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:25:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:25:57,666 INFO L87 Difference]: Start difference. First operand 98780 states and 264272 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:25:58,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:25:58,666 INFO L93 Difference]: Finished difference Result 152985 states and 407630 transitions. [2021-07-13 18:25:58,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:25:58,667 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:25:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:25:59,009 INFO L225 Difference]: With dead ends: 152985 [2021-07-13 18:25:59,009 INFO L226 Difference]: Without dead ends: 152985 [2021-07-13 18:25:59,009 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:25:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152985 states. [2021-07-13 18:26:01,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152985 to 98780. [2021-07-13 18:26:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98780 states, 98778 states have (on average 2.675413553625301) internal successors, (264272), 98779 states have internal predecessors, (264272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98780 states to 98780 states and 264272 transitions. [2021-07-13 18:26:02,246 INFO L78 Accepts]: Start accepts. Automaton has 98780 states and 264272 transitions. Word has length 408 [2021-07-13 18:26:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:02,246 INFO L482 AbstractCegarLoop]: Abstraction has 98780 states and 264272 transitions. [2021-07-13 18:26:02,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 98780 states and 264272 transitions. [2021-07-13 18:26:02,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:02,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:02,406 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:02,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:02,624 INFO L430 AbstractCegarLoop]: === Iteration 64 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:02,624 INFO L82 PathProgramCache]: Analyzing trace with hash -675340305, now seen corresponding path program 25 times [2021-07-13 18:26:02,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:02,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497843755] [2021-07-13 18:26:02,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:03,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:03,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497843755] [2021-07-13 18:26:03,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497843755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:03,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088964337] [2021-07-13 18:26:03,129 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 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 [2021-07-13 18:26:03,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:03,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:03,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:03,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088964337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:03,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:03,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:03,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144186408] [2021-07-13 18:26:03,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:03,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:03,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:03,666 INFO L87 Difference]: Start difference. First operand 98780 states and 264272 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:04,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:04,569 INFO L93 Difference]: Finished difference Result 132670 states and 352212 transitions. [2021-07-13 18:26:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:26:04,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:04,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:04,856 INFO L225 Difference]: With dead ends: 132670 [2021-07-13 18:26:04,856 INFO L226 Difference]: Without dead ends: 132670 [2021-07-13 18:26:04,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 579.1ms TimeCoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:26:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132670 states. [2021-07-13 18:26:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132670 to 101940. [2021-07-13 18:26:07,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101940 states, 101938 states have (on average 2.6762345739567186) internal successors, (272810), 101939 states have internal predecessors, (272810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101940 states to 101940 states and 272810 transitions. [2021-07-13 18:26:08,315 INFO L78 Accepts]: Start accepts. Automaton has 101940 states and 272810 transitions. Word has length 408 [2021-07-13 18:26:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:08,316 INFO L482 AbstractCegarLoop]: Abstraction has 101940 states and 272810 transitions. [2021-07-13 18:26:08,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:08,316 INFO L276 IsEmpty]: Start isEmpty. Operand 101940 states and 272810 transitions. [2021-07-13 18:26:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:08,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:08,501 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:08,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 18:26:08,718 INFO L430 AbstractCegarLoop]: === Iteration 65 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:08,718 INFO L82 PathProgramCache]: Analyzing trace with hash -525924331, now seen corresponding path program 26 times [2021-07-13 18:26:08,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:08,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261456510] [2021-07-13 18:26:08,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:08,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261456510] [2021-07-13 18:26:08,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261456510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:08,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219406399] [2021-07-13 18:26:08,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 18:26:08,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:26:08,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:09,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:09,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:09,643 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:26:09,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:09,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219406399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:09,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:09,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:09,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247171924] [2021-07-13 18:26:09,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:09,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:09,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:09,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:09,779 INFO L87 Difference]: Start difference. First operand 101940 states and 272810 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:10,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:10,717 INFO L93 Difference]: Finished difference Result 156300 states and 415942 transitions. [2021-07-13 18:26:10,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:26:10,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:10,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:11,068 INFO L225 Difference]: With dead ends: 156300 [2021-07-13 18:26:11,068 INFO L226 Difference]: Without dead ends: 156300 [2021-07-13 18:26:11,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 217.7ms TimeCoverageRelationStatistics Valid=325, Invalid=1007, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:26:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156300 states. [2021-07-13 18:26:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156300 to 101940. [2021-07-13 18:26:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101940 states, 101938 states have (on average 2.6762345739567186) internal successors, (272810), 101939 states have internal predecessors, (272810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101940 states to 101940 states and 272810 transitions. [2021-07-13 18:26:14,481 INFO L78 Accepts]: Start accepts. Automaton has 101940 states and 272810 transitions. Word has length 408 [2021-07-13 18:26:14,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:14,481 INFO L482 AbstractCegarLoop]: Abstraction has 101940 states and 272810 transitions. [2021-07-13 18:26:14,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 101940 states and 272810 transitions. [2021-07-13 18:26:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:14,672 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:14,672 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:14,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:14,874 INFO L430 AbstractCegarLoop]: === Iteration 66 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:14,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:14,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1651203209, now seen corresponding path program 27 times [2021-07-13 18:26:14,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:14,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185889772] [2021-07-13 18:26:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:15,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185889772] [2021-07-13 18:26:15,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185889772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:15,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452226165] [2021-07-13 18:26:15,034 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 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 [2021-07-13 18:26:15,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:26:15,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:15,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:15,681 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:26:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:16,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452226165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:16,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:16,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:16,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688507223] [2021-07-13 18:26:16,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:16,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:16,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:16,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:16,005 INFO L87 Difference]: Start difference. First operand 101940 states and 272810 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:16,891 INFO L93 Difference]: Finished difference Result 161260 states and 429321 transitions. [2021-07-13 18:26:16,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:26:16,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:17,246 INFO L225 Difference]: With dead ends: 161260 [2021-07-13 18:26:17,246 INFO L226 Difference]: Without dead ends: 161260 [2021-07-13 18:26:17,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:26:17,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161260 states. [2021-07-13 18:26:20,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161260 to 103760. [2021-07-13 18:26:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103760 states, 103758 states have (on average 2.6767189036026138) internal successors, (277731), 103759 states have internal predecessors, (277731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103760 states to 103760 states and 277731 transitions. [2021-07-13 18:26:21,193 INFO L78 Accepts]: Start accepts. Automaton has 103760 states and 277731 transitions. Word has length 408 [2021-07-13 18:26:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:21,193 INFO L482 AbstractCegarLoop]: Abstraction has 103760 states and 277731 transitions. [2021-07-13 18:26:21,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 103760 states and 277731 transitions. [2021-07-13 18:26:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:21,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:21,437 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:21,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 18:26:21,654 INFO L430 AbstractCegarLoop]: === Iteration 67 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1490861269, now seen corresponding path program 28 times [2021-07-13 18:26:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:21,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002872387] [2021-07-13 18:26:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:21,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002872387] [2021-07-13 18:26:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002872387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727345103] [2021-07-13 18:26:21,824 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 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 [2021-07-13 18:26:22,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:26:22,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:22,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:22,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:23,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727345103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:23,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:23,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:23,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358664757] [2021-07-13 18:26:23,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:23,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:23,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:23,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:23,109 INFO L87 Difference]: Start difference. First operand 103760 states and 277731 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:24,040 INFO L93 Difference]: Finished difference Result 133775 states and 354173 transitions. [2021-07-13 18:26:24,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:26:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:24,332 INFO L225 Difference]: With dead ends: 133775 [2021-07-13 18:26:24,332 INFO L226 Difference]: Without dead ends: 133775 [2021-07-13 18:26:24,333 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:26:24,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133775 states. [2021-07-13 18:26:26,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133775 to 104020. [2021-07-13 18:26:26,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104020 states, 104018 states have (on average 2.6764021611644138) internal successors, (278394), 104019 states have internal predecessors, (278394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:27,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104020 states to 104020 states and 278394 transitions. [2021-07-13 18:26:27,881 INFO L78 Accepts]: Start accepts. Automaton has 104020 states and 278394 transitions. Word has length 408 [2021-07-13 18:26:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:27,882 INFO L482 AbstractCegarLoop]: Abstraction has 104020 states and 278394 transitions. [2021-07-13 18:26:27,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 104020 states and 278394 transitions. [2021-07-13 18:26:28,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:28,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:28,072 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:28,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:28,285 INFO L430 AbstractCegarLoop]: === Iteration 68 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -31418483, now seen corresponding path program 29 times [2021-07-13 18:26:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:28,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308469380] [2021-07-13 18:26:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:28,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:28,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308469380] [2021-07-13 18:26:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308469380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:28,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216489715] [2021-07-13 18:26:28,487 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 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 [2021-07-13 18:26:28,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:26:28,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:28,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:28,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:29,491 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:26:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:29,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216489715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:29,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:29,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:29,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099582877] [2021-07-13 18:26:29,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:29,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:29,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:29,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:29,613 INFO L87 Difference]: Start difference. First operand 104020 states and 278394 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:30,599 INFO L93 Difference]: Finished difference Result 154635 states and 411610 transitions. [2021-07-13 18:26:30,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:26:30,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:31,031 INFO L225 Difference]: With dead ends: 154635 [2021-07-13 18:26:31,031 INFO L226 Difference]: Without dead ends: 154635 [2021-07-13 18:26:31,032 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:26:31,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154635 states. [2021-07-13 18:26:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154635 to 105100. [2021-07-13 18:26:33,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105100 states, 105098 states have (on average 2.677006222763516) internal successors, (281348), 105099 states have internal predecessors, (281348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105100 states to 105100 states and 281348 transitions. [2021-07-13 18:26:33,923 INFO L78 Accepts]: Start accepts. Automaton has 105100 states and 281348 transitions. Word has length 408 [2021-07-13 18:26:33,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:33,923 INFO L482 AbstractCegarLoop]: Abstraction has 105100 states and 281348 transitions. [2021-07-13 18:26:33,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 105100 states and 281348 transitions. [2021-07-13 18:26:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:34,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:34,112 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:34,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 18:26:34,329 INFO L430 AbstractCegarLoop]: === Iteration 69 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:34,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1156697361, now seen corresponding path program 30 times [2021-07-13 18:26:34,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:34,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532024559] [2021-07-13 18:26:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:34,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:34,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532024559] [2021-07-13 18:26:34,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532024559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:34,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457231855] [2021-07-13 18:26:34,462 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 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 [2021-07-13 18:26:34,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:26:34,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:34,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:35,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457231855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:35,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:35,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906374091] [2021-07-13 18:26:35,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:35,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:35,539 INFO L87 Difference]: Start difference. First operand 105100 states and 281348 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:36,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:36,449 INFO L93 Difference]: Finished difference Result 165320 states and 440234 transitions. [2021-07-13 18:26:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:26:36,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:36,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:36,817 INFO L225 Difference]: With dead ends: 165320 [2021-07-13 18:26:36,817 INFO L226 Difference]: Without dead ends: 165320 [2021-07-13 18:26:36,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=315, Invalid=945, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:26:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165320 states. [2021-07-13 18:26:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165320 to 104020. [2021-07-13 18:26:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104020 states, 104018 states have (on average 2.6764021611644138) internal successors, (278394), 104019 states have internal predecessors, (278394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104020 states to 104020 states and 278394 transitions. [2021-07-13 18:26:40,380 INFO L78 Accepts]: Start accepts. Automaton has 104020 states and 278394 transitions. Word has length 408 [2021-07-13 18:26:40,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:40,380 INFO L482 AbstractCegarLoop]: Abstraction has 104020 states and 278394 transitions. [2021-07-13 18:26:40,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:40,381 INFO L276 IsEmpty]: Start isEmpty. Operand 104020 states and 278394 transitions. [2021-07-13 18:26:40,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:40,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:40,577 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:40,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 18:26:40,796 INFO L430 AbstractCegarLoop]: === Iteration 70 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:40,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:40,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1985367117, now seen corresponding path program 31 times [2021-07-13 18:26:40,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:40,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434554403] [2021-07-13 18:26:40,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:41,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:41,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434554403] [2021-07-13 18:26:41,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434554403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:41,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482645391] [2021-07-13 18:26:41,621 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 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 [2021-07-13 18:26:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:41,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:42,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482645391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:42,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:42,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:42,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012611130] [2021-07-13 18:26:42,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:42,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:42,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:42,164 INFO L87 Difference]: Start difference. First operand 104020 states and 278394 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:43,184 INFO L93 Difference]: Finished difference Result 160275 states and 426785 transitions. [2021-07-13 18:26:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:26:43,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:43,961 INFO L225 Difference]: With dead ends: 160275 [2021-07-13 18:26:43,961 INFO L226 Difference]: Without dead ends: 160275 [2021-07-13 18:26:43,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:26:44,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160275 states. [2021-07-13 18:26:46,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160275 to 109480. [2021-07-13 18:26:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109480 states, 109478 states have (on average 2.677770876340452) internal successors, (293157), 109479 states have internal predecessors, (293157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109480 states to 109480 states and 293157 transitions. [2021-07-13 18:26:46,943 INFO L78 Accepts]: Start accepts. Automaton has 109480 states and 293157 transitions. Word has length 408 [2021-07-13 18:26:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:46,943 INFO L482 AbstractCegarLoop]: Abstraction has 109480 states and 293157 transitions. [2021-07-13 18:26:46,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 109480 states and 293157 transitions. [2021-07-13 18:26:47,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:47,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:47,795 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:48,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 18:26:48,009 INFO L430 AbstractCegarLoop]: === Iteration 71 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:48,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1849276881, now seen corresponding path program 32 times [2021-07-13 18:26:48,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:48,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579104539] [2021-07-13 18:26:48,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:48,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:48,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:48,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579104539] [2021-07-13 18:26:48,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579104539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:48,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073268390] [2021-07-13 18:26:48,149 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 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 [2021-07-13 18:26:48,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:26:48,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:48,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:48,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073268390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:48,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:48,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-07-13 18:26:48,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293610886] [2021-07-13 18:26:48,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:48,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:48,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:48,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:48,709 INFO L87 Difference]: Start difference. First operand 109480 states and 293157 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:49,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:49,762 INFO L93 Difference]: Finished difference Result 135850 states and 359912 transitions. [2021-07-13 18:26:49,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:26:49,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:49,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:50,393 INFO L225 Difference]: With dead ends: 135850 [2021-07-13 18:26:50,398 INFO L226 Difference]: Without dead ends: 135850 [2021-07-13 18:26:50,398 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 200.5ms TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:26:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135850 states. [2021-07-13 18:26:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135850 to 114800. [2021-07-13 18:26:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114800 states, 114798 states have (on average 2.679515322566595) internal successors, (307603), 114799 states have internal predecessors, (307603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114800 states to 114800 states and 307603 transitions. [2021-07-13 18:26:53,226 INFO L78 Accepts]: Start accepts. Automaton has 114800 states and 307603 transitions. Word has length 408 [2021-07-13 18:26:53,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:26:53,226 INFO L482 AbstractCegarLoop]: Abstraction has 114800 states and 307603 transitions. [2021-07-13 18:26:53,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:53,226 INFO L276 IsEmpty]: Start isEmpty. Operand 114800 states and 307603 transitions. [2021-07-13 18:26:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:26:54,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:26:54,129 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:26:54,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:26:54,346 INFO L430 AbstractCegarLoop]: === Iteration 72 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:26:54,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:26:54,346 INFO L82 PathProgramCache]: Analyzing trace with hash 874976533, now seen corresponding path program 33 times [2021-07-13 18:26:54,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:26:54,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841452534] [2021-07-13 18:26:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:26:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:26:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:26:54,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:26:54,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841452534] [2021-07-13 18:26:54,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841452534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:54,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188206408] [2021-07-13 18:26:54,498 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 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 [2021-07-13 18:26:54,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:26:54,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:26:54,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:26:54,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:26:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:26:55,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188206408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:26:55,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:26:55,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:26:55,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868333944] [2021-07-13 18:26:55,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:26:55,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:26:55,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:26:55,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:26:55,264 INFO L87 Difference]: Start difference. First operand 114800 states and 307603 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:26:56,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:26:56,586 INFO L93 Difference]: Finished difference Result 150170 states and 399764 transitions. [2021-07-13 18:26:56,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:26:56,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:26:56,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:26:57,179 INFO L225 Difference]: With dead ends: 150170 [2021-07-13 18:26:57,180 INFO L226 Difference]: Without dead ends: 150170 [2021-07-13 18:26:57,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=393, Invalid=1167, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:26:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150170 states. [2021-07-13 18:26:59,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150170 to 114800. [2021-07-13 18:26:59,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114800 states, 114798 states have (on average 2.679515322566595) internal successors, (307603), 114799 states have internal predecessors, (307603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114800 states to 114800 states and 307603 transitions. [2021-07-13 18:27:00,140 INFO L78 Accepts]: Start accepts. Automaton has 114800 states and 307603 transitions. Word has length 408 [2021-07-13 18:27:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:00,140 INFO L482 AbstractCegarLoop]: Abstraction has 114800 states and 307603 transitions. [2021-07-13 18:27:00,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 114800 states and 307603 transitions. [2021-07-13 18:27:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:27:00,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:00,340 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:00,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:00,558 INFO L430 AbstractCegarLoop]: === Iteration 73 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:00,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:00,559 INFO L82 PathProgramCache]: Analyzing trace with hash -250302345, now seen corresponding path program 34 times [2021-07-13 18:27:00,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:00,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22905886] [2021-07-13 18:27:00,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:27:00,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:00,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22905886] [2021-07-13 18:27:00,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22905886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:00,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306984848] [2021-07-13 18:27:00,744 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 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 [2021-07-13 18:27:01,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:27:01,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:01,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:01,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:27:01,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306984848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:01,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:01,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:27:01,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36376506] [2021-07-13 18:27:01,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:27:01,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:01,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:27:01,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:27:01,828 INFO L87 Difference]: Start difference. First operand 114800 states and 307603 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:02,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:02,711 INFO L93 Difference]: Finished difference Result 157890 states and 420467 transitions. [2021-07-13 18:27:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:27:02,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:27:02,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:03,068 INFO L225 Difference]: With dead ends: 157890 [2021-07-13 18:27:03,068 INFO L226 Difference]: Without dead ends: 157890 [2021-07-13 18:27:03,068 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 228.7ms TimeCoverageRelationStatistics Valid=383, Invalid=1099, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:27:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157890 states. [2021-07-13 18:27:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157890 to 113720. [2021-07-13 18:27:06,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113720 states, 113718 states have (on average 2.6789866160150546) internal successors, (304649), 113719 states have internal predecessors, (304649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:06,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113720 states to 113720 states and 304649 transitions. [2021-07-13 18:27:06,554 INFO L78 Accepts]: Start accepts. Automaton has 113720 states and 304649 transitions. Word has length 408 [2021-07-13 18:27:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:06,555 INFO L482 AbstractCegarLoop]: Abstraction has 113720 states and 304649 transitions. [2021-07-13 18:27:06,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:06,555 INFO L276 IsEmpty]: Start isEmpty. Operand 113720 states and 304649 transitions. [2021-07-13 18:27:06,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:27:06,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:06,781 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:06,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:06,999 INFO L430 AbstractCegarLoop]: === Iteration 74 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:06,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1403205163, now seen corresponding path program 35 times [2021-07-13 18:27:06,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:06,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816840359] [2021-07-13 18:27:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:27:07,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:07,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816840359] [2021-07-13 18:27:07,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816840359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:07,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536418803] [2021-07-13 18:27:07,579 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 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 [2021-07-13 18:27:07,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:27:07,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:07,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:07,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:08,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:27:08,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536418803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:08,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:08,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:27:08,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519896910] [2021-07-13 18:27:08,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:27:08,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:08,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:27:08,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:27:08,279 INFO L87 Difference]: Start difference. First operand 113720 states and 304649 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:09,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:09,266 INFO L93 Difference]: Finished difference Result 160390 states and 426475 transitions. [2021-07-13 18:27:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:27:09,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:27:09,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:10,062 INFO L225 Difference]: With dead ends: 160390 [2021-07-13 18:27:10,062 INFO L226 Difference]: Without dead ends: 160390 [2021-07-13 18:27:10,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=373, Invalid=1033, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 18:27:10,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160390 states. [2021-07-13 18:27:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160390 to 117360. [2021-07-13 18:27:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117360 states, 117358 states have (on average 2.6797576645818775) internal successors, (314491), 117359 states have internal predecessors, (314491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:14,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117360 states to 117360 states and 314491 transitions. [2021-07-13 18:27:14,090 INFO L78 Accepts]: Start accepts. Automaton has 117360 states and 314491 transitions. Word has length 408 [2021-07-13 18:27:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:14,090 INFO L482 AbstractCegarLoop]: Abstraction has 117360 states and 314491 transitions. [2021-07-13 18:27:14,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 117360 states and 314491 transitions. [2021-07-13 18:27:14,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:27:14,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:14,312 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:14,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-07-13 18:27:14,530 INFO L430 AbstractCegarLoop]: === Iteration 75 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:14,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:14,530 INFO L82 PathProgramCache]: Analyzing trace with hash -942881865, now seen corresponding path program 36 times [2021-07-13 18:27:14,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:14,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537035861] [2021-07-13 18:27:14,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:27:14,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537035861] [2021-07-13 18:27:14,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537035861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354123264] [2021-07-13 18:27:14,718 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 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 [2021-07-13 18:27:15,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:27:15,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:15,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:15,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:27:15,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354123264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:15,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:15,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:27:15,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342496692] [2021-07-13 18:27:15,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:27:15,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:15,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:27:15,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:27:15,963 INFO L87 Difference]: Start difference. First operand 117360 states and 314491 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:17,084 INFO L93 Difference]: Finished difference Result 154525 states and 410727 transitions. [2021-07-13 18:27:17,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:27:17,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:27:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:17,526 INFO L225 Difference]: With dead ends: 154525 [2021-07-13 18:27:17,526 INFO L226 Difference]: Without dead ends: 154525 [2021-07-13 18:27:17,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:27:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154525 states. [2021-07-13 18:27:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154525 to 120260. [2021-07-13 18:27:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120260 states, 120258 states have (on average 2.680620000332618) internal successors, (322366), 120259 states have internal predecessors, (322366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120260 states to 120260 states and 322366 transitions. [2021-07-13 18:27:21,336 INFO L78 Accepts]: Start accepts. Automaton has 120260 states and 322366 transitions. Word has length 408 [2021-07-13 18:27:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:21,336 INFO L482 AbstractCegarLoop]: Abstraction has 120260 states and 322366 transitions. [2021-07-13 18:27:21,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 120260 states and 322366 transitions. [2021-07-13 18:27:21,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-07-13 18:27:21,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:21,553 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:21,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:21,769 INFO L430 AbstractCegarLoop]: === Iteration 76 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1537339029, now seen corresponding path program 37 times [2021-07-13 18:27:21,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:21,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036748073] [2021-07-13 18:27:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:22,512 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1084 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:27:22,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:22,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036748073] [2021-07-13 18:27:22,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036748073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:22,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726631574] [2021-07-13 18:27:22,542 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 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 [2021-07-13 18:27:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:22,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:23,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 24 proven. 1061 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:27:23,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726631574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:23,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:23,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 19 [2021-07-13 18:27:23,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997457794] [2021-07-13 18:27:23,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 18:27:23,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:23,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 18:27:23,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-07-13 18:27:23,067 INFO L87 Difference]: Start difference. First operand 120260 states and 322366 transitions. Second operand has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:23,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:23,924 INFO L93 Difference]: Finished difference Result 144180 states and 382907 transitions. [2021-07-13 18:27:23,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:27:23,924 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 408 [2021-07-13 18:27:23,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:24,241 INFO L225 Difference]: With dead ends: 144180 [2021-07-13 18:27:24,241 INFO L226 Difference]: Without dead ends: 144180 [2021-07-13 18:27:24,241 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 214.4ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:27:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144180 states. [2021-07-13 18:27:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144180 to 122420. [2021-07-13 18:27:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122420 states, 122418 states have (on average 2.6815827737750983) internal successors, (328274), 122419 states have internal predecessors, (328274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:27,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-07-13 18:27:27,739 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 408 [2021-07-13 18:27:27,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:27,739 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-07-13 18:27:27,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 20.473684210526315) internal successors, (389), 19 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:27,740 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-07-13 18:27:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:27:28,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:28,695 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:28,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:28,912 INFO L430 AbstractCegarLoop]: === Iteration 77 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:28,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:28,913 INFO L82 PathProgramCache]: Analyzing trace with hash -540359732, now seen corresponding path program 26 times [2021-07-13 18:27:28,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:28,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570146662] [2021-07-13 18:27:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:29,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:29,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570146662] [2021-07-13 18:27:29,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570146662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:29,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409087522] [2021-07-13 18:27:29,102 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 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 [2021-07-13 18:27:29,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:27:29,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:29,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:29,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:29,954 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:29,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:29,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409087522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:29,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:29,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:27:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730607929] [2021-07-13 18:27:29,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:27:29,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:27:29,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:27:29,995 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:31,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:31,117 INFO L93 Difference]: Finished difference Result 148110 states and 394281 transitions. [2021-07-13 18:27:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:27:31,118 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:27:31,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:31,461 INFO L225 Difference]: With dead ends: 148110 [2021-07-13 18:27:31,461 INFO L226 Difference]: Without dead ends: 148110 [2021-07-13 18:27:31,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=517, Invalid=1553, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:27:31,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148110 states. [2021-07-13 18:27:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148110 to 121340. [2021-07-13 18:27:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121340 states, 121338 states have (on average 2.6811056717598776) internal successors, (325320), 121339 states have internal predecessors, (325320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-07-13 18:27:35,538 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-07-13 18:27:35,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:35,538 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-07-13 18:27:35,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:35,539 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-07-13 18:27:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:27:35,756 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:35,757 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:35,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:35,973 INFO L430 AbstractCegarLoop]: === Iteration 78 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:35,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:35,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1824663608, now seen corresponding path program 27 times [2021-07-13 18:27:35,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:35,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592325413] [2021-07-13 18:27:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:36,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:36,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592325413] [2021-07-13 18:27:36,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592325413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:36,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182108863] [2021-07-13 18:27:36,152 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 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 [2021-07-13 18:27:36,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:27:36,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:36,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:37,380 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:37,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182108863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:37,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:37,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:27:37,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654250980] [2021-07-13 18:27:37,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:27:37,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:37,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:27:37,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:27:37,663 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:38,796 INFO L93 Difference]: Finished difference Result 152100 states and 404453 transitions. [2021-07-13 18:27:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:27:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:27:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:39,138 INFO L225 Difference]: With dead ends: 152100 [2021-07-13 18:27:39,138 INFO L226 Difference]: Without dead ends: 152100 [2021-07-13 18:27:39,142 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 301.0ms TimeCoverageRelationStatistics Valid=506, Invalid=1474, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:27:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152100 states. [2021-07-13 18:27:41,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152100 to 121340. [2021-07-13 18:27:42,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121340 states, 121338 states have (on average 2.6811056717598776) internal successors, (325320), 121339 states have internal predecessors, (325320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121340 states to 121340 states and 325320 transitions. [2021-07-13 18:27:42,427 INFO L78 Accepts]: Start accepts. Automaton has 121340 states and 325320 transitions. Word has length 409 [2021-07-13 18:27:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:42,428 INFO L482 AbstractCegarLoop]: Abstraction has 121340 states and 325320 transitions. [2021-07-13 18:27:42,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 121340 states and 325320 transitions. [2021-07-13 18:27:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:27:43,001 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:43,001 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:43,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 18:27:43,215 INFO L430 AbstractCegarLoop]: === Iteration 79 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:43,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1918198348, now seen corresponding path program 28 times [2021-07-13 18:27:43,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:43,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654597311] [2021-07-13 18:27:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:43,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:43,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654597311] [2021-07-13 18:27:43,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654597311] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:43,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87832901] [2021-07-13 18:27:43,503 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 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 [2021-07-13 18:27:44,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:27:44,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:44,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:44,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:44,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87832901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:44,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:44,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:27:44,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850838944] [2021-07-13 18:27:44,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:27:44,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:44,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:27:44,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:27:44,439 INFO L87 Difference]: Start difference. First operand 121340 states and 325320 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:45,391 INFO L93 Difference]: Finished difference Result 155890 states and 414296 transitions. [2021-07-13 18:27:45,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:27:45,392 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:27:45,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:46,055 INFO L225 Difference]: With dead ends: 155890 [2021-07-13 18:27:46,055 INFO L226 Difference]: Without dead ends: 155890 [2021-07-13 18:27:46,055 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 448.6ms TimeCoverageRelationStatistics Valid=495, Invalid=1397, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:27:46,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155890 states. [2021-07-13 18:27:48,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155890 to 119520. [2021-07-13 18:27:48,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119520 states, 119518 states have (on average 2.680759383523821) internal successors, (320399), 119519 states have internal predecessors, (320399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119520 states to 119520 states and 320399 transitions. [2021-07-13 18:27:49,496 INFO L78 Accepts]: Start accepts. Automaton has 119520 states and 320399 transitions. Word has length 409 [2021-07-13 18:27:49,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:49,496 INFO L482 AbstractCegarLoop]: Abstraction has 119520 states and 320399 transitions. [2021-07-13 18:27:49,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 119520 states and 320399 transitions. [2021-07-13 18:27:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:27:49,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:49,716 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:49,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:27:49,935 INFO L430 AbstractCegarLoop]: === Iteration 80 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:49,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:49,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1222289736, now seen corresponding path program 29 times [2021-07-13 18:27:49,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:49,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433743083] [2021-07-13 18:27:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:50,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433743083] [2021-07-13 18:27:50,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433743083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:50,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214501724] [2021-07-13 18:27:50,094 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 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 [2021-07-13 18:27:50,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:27:50,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:50,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:50,695 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:27:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:51,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214501724] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:51,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:51,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:27:51,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608961526] [2021-07-13 18:27:51,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:27:51,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:51,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:27:51,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:27:51,054 INFO L87 Difference]: Start difference. First operand 119520 states and 320399 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:51,953 INFO L93 Difference]: Finished difference Result 153090 states and 406682 transitions. [2021-07-13 18:27:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:27:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:27:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:52,306 INFO L225 Difference]: With dead ends: 153090 [2021-07-13 18:27:52,306 INFO L226 Difference]: Without dead ends: 153090 [2021-07-13 18:27:52,306 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=484, Invalid=1322, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:27:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153090 states. [2021-07-13 18:27:55,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153090 to 122420. [2021-07-13 18:27:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122420 states, 122418 states have (on average 2.6815827737750983) internal successors, (328274), 122419 states have internal predecessors, (328274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:55,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122420 states to 122420 states and 328274 transitions. [2021-07-13 18:27:55,876 INFO L78 Accepts]: Start accepts. Automaton has 122420 states and 328274 transitions. Word has length 409 [2021-07-13 18:27:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:27:55,876 INFO L482 AbstractCegarLoop]: Abstraction has 122420 states and 328274 transitions. [2021-07-13 18:27:55,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:55,876 INFO L276 IsEmpty]: Start isEmpty. Operand 122420 states and 328274 transitions. [2021-07-13 18:27:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:27:56,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:27:56,719 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:27:56,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 18:27:56,937 INFO L430 AbstractCegarLoop]: === Iteration 81 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:27:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:27:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1277484852, now seen corresponding path program 30 times [2021-07-13 18:27:56,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:27:56,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434270440] [2021-07-13 18:27:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:27:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:27:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:57,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:27:57,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434270440] [2021-07-13 18:27:57,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434270440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:57,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5888860] [2021-07-13 18:27:57,097 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 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 [2021-07-13 18:27:57,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:27:57,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:27:57,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:27:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:27:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:27:58,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5888860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:27:58,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:27:58,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:27:58,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724250700] [2021-07-13 18:27:58,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:27:58,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:27:58,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:27:58,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:27:58,254 INFO L87 Difference]: Start difference. First operand 122420 states and 328274 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:27:59,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:27:59,377 INFO L93 Difference]: Finished difference Result 151720 states and 403302 transitions. [2021-07-13 18:27:59,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:27:59,378 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:27:59,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:27:59,804 INFO L225 Difference]: With dead ends: 151720 [2021-07-13 18:27:59,804 INFO L226 Difference]: Without dead ends: 151720 [2021-07-13 18:27:59,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=473, Invalid=1249, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:28:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151720 states. [2021-07-13 18:28:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151720 to 125320. [2021-07-13 18:28:03,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125320 states, 125318 states have (on average 2.6823680556663847) internal successors, (336149), 125319 states have internal predecessors, (336149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125320 states to 125320 states and 336149 transitions. [2021-07-13 18:28:03,505 INFO L78 Accepts]: Start accepts. Automaton has 125320 states and 336149 transitions. Word has length 409 [2021-07-13 18:28:03,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:03,505 INFO L482 AbstractCegarLoop]: Abstraction has 125320 states and 336149 transitions. [2021-07-13 18:28:03,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:03,505 INFO L276 IsEmpty]: Start isEmpty. Operand 125320 states and 336149 transitions. [2021-07-13 18:28:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:28:04,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:04,115 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:04,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:04,341 INFO L430 AbstractCegarLoop]: === Iteration 82 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:04,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1129817400, now seen corresponding path program 31 times [2021-07-13 18:28:04,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:04,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142256968] [2021-07-13 18:28:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:28:04,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:04,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142256968] [2021-07-13 18:28:04,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142256968] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:04,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346654458] [2021-07-13 18:28:04,519 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 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 [2021-07-13 18:28:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:04,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:28:04,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:28:05,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346654458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:05,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:05,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:28:05,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781546808] [2021-07-13 18:28:05,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:28:05,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:05,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:28:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:28:05,079 INFO L87 Difference]: Start difference. First operand 125320 states and 336149 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:06,119 INFO L93 Difference]: Finished difference Result 150655 states and 399845 transitions. [2021-07-13 18:28:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:28:06,120 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:28:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:06,936 INFO L225 Difference]: With dead ends: 150655 [2021-07-13 18:28:06,936 INFO L226 Difference]: Without dead ends: 150655 [2021-07-13 18:28:06,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:28:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150655 states. [2021-07-13 18:28:09,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150655 to 124240. [2021-07-13 18:28:09,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-07-13 18:28:10,704 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-07-13 18:28:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:10,704 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-07-13 18:28:10,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-07-13 18:28:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:28:10,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:10,947 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:11,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:11,165 INFO L430 AbstractCegarLoop]: === Iteration 83 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1518600012, now seen corresponding path program 32 times [2021-07-13 18:28:11,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:11,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496621285] [2021-07-13 18:28:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:28:11,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:11,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496621285] [2021-07-13 18:28:11,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496621285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:11,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38523430] [2021-07-13 18:28:11,428 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 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 [2021-07-13 18:28:11,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:28:11,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:11,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:28:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:28:12,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38523430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:12,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:12,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-07-13 18:28:12,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084626410] [2021-07-13 18:28:12,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:28:12,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:12,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:28:12,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:28:12,349 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:13,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:13,388 INFO L93 Difference]: Finished difference Result 145070 states and 385658 transitions. [2021-07-13 18:28:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:28:13,389 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:28:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:13,701 INFO L225 Difference]: With dead ends: 145070 [2021-07-13 18:28:13,701 INFO L226 Difference]: Without dead ends: 145070 [2021-07-13 18:28:13,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:28:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145070 states. [2021-07-13 18:28:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145070 to 124240. [2021-07-13 18:28:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124240 states, 124238 states have (on average 2.681908916756548) internal successors, (333195), 124239 states have internal predecessors, (333195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124240 states to 124240 states and 333195 transitions. [2021-07-13 18:28:17,089 INFO L78 Accepts]: Start accepts. Automaton has 124240 states and 333195 transitions. Word has length 409 [2021-07-13 18:28:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:17,089 INFO L482 AbstractCegarLoop]: Abstraction has 124240 states and 333195 transitions. [2021-07-13 18:28:17,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 124240 states and 333195 transitions. [2021-07-13 18:28:17,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-07-13 18:28:17,302 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:17,302 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:17,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:17,516 INFO L430 AbstractCegarLoop]: === Iteration 84 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:17,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:17,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1199500360, now seen corresponding path program 33 times [2021-07-13 18:28:17,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:17,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373336996] [2021-07-13 18:28:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:17,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1383 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:28:18,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373336996] [2021-07-13 18:28:18,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373336996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:18,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153739178] [2021-07-13 18:28:18,210 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 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 [2021-07-13 18:28:18,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:28:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:18,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-13 18:28:18,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1422 backedges. 27 proven. 1360 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:28:18,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153739178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:18,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:18,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 22 [2021-07-13 18:28:18,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386716476] [2021-07-13 18:28:18,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-13 18:28:18,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:18,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-13 18:28:18,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-07-13 18:28:18,927 INFO L87 Difference]: Start difference. First operand 124240 states and 333195 transitions. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:19,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:19,786 INFO L93 Difference]: Finished difference Result 138275 states and 368306 transitions. [2021-07-13 18:28:19,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:28:19,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 409 [2021-07-13 18:28:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:20,481 INFO L225 Difference]: With dead ends: 138275 [2021-07-13 18:28:20,482 INFO L226 Difference]: Without dead ends: 138275 [2021-07-13 18:28:20,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:28:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138275 states. [2021-07-13 18:28:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138275 to 121000. [2021-07-13 18:28:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121000 states, 120998 states have (on average 2.6804823220218514) internal successors, (324333), 120999 states have internal predecessors, (324333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:23,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121000 states to 121000 states and 324333 transitions. [2021-07-13 18:28:23,374 INFO L78 Accepts]: Start accepts. Automaton has 121000 states and 324333 transitions. Word has length 409 [2021-07-13 18:28:23,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:23,375 INFO L482 AbstractCegarLoop]: Abstraction has 121000 states and 324333 transitions. [2021-07-13 18:28:23,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:23,375 INFO L276 IsEmpty]: Start isEmpty. Operand 121000 states and 324333 transitions. [2021-07-13 18:28:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-07-13 18:28:23,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:23,949 INFO L508 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:24,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:24,166 INFO L430 AbstractCegarLoop]: === Iteration 85 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:24,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:24,166 INFO L82 PathProgramCache]: Analyzing trace with hash 642031821, now seen corresponding path program 11 times [2021-07-13 18:28:24,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:24,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305888486] [2021-07-13 18:28:24,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:24,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:24,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305888486] [2021-07-13 18:28:24,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305888486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:24,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709494840] [2021-07-13 18:28:24,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:24,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-13 18:28:24,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:24,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:25,208 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:28:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 33 proven. 2090 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:28:25,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709494840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:25,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:25,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-07-13 18:28:25,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145881537] [2021-07-13 18:28:25,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-13 18:28:25,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:25,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-13 18:28:25,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-07-13 18:28:25,271 INFO L87 Difference]: Start difference. First operand 121000 states and 324333 transitions. Second operand has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:26,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:26,296 INFO L93 Difference]: Finished difference Result 134722 states and 359461 transitions. [2021-07-13 18:28:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:28:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 439 [2021-07-13 18:28:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:26,596 INFO L225 Difference]: With dead ends: 134722 [2021-07-13 18:28:26,596 INFO L226 Difference]: Without dead ends: 134722 [2021-07-13 18:28:26,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=748, Invalid=1604, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 18:28:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134722 states. [2021-07-13 18:28:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134722 to 126475. [2021-07-13 18:28:29,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126475 states, 126473 states have (on average 2.6800107532833093) internal successors, (338949), 126474 states have internal predecessors, (338949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126475 states to 126475 states and 338949 transitions. [2021-07-13 18:28:29,763 INFO L78 Accepts]: Start accepts. Automaton has 126475 states and 338949 transitions. Word has length 439 [2021-07-13 18:28:29,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:29,763 INFO L482 AbstractCegarLoop]: Abstraction has 126475 states and 338949 transitions. [2021-07-13 18:28:29,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 126475 states and 338949 transitions. [2021-07-13 18:28:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:29,984 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:29,984 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:30,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:30,202 INFO L430 AbstractCegarLoop]: === Iteration 86 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1724136234, now seen corresponding path program 38 times [2021-07-13 18:28:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:30,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233059598] [2021-07-13 18:28:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:30,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:30,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233059598] [2021-07-13 18:28:30,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233059598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:30,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996803369] [2021-07-13 18:28:30,999 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 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 [2021-07-13 18:28:31,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:28:31,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:31,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:31,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:31,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996803369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:31,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:31,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:31,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165376303] [2021-07-13 18:28:31,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:31,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:31,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:31,591 INFO L87 Difference]: Start difference. First operand 126475 states and 338949 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:32,579 INFO L93 Difference]: Finished difference Result 177585 states and 471277 transitions. [2021-07-13 18:28:32,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 18:28:32,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:28:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:33,266 INFO L225 Difference]: With dead ends: 177585 [2021-07-13 18:28:33,267 INFO L226 Difference]: Without dead ends: 177585 [2021-07-13 18:28:33,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 191.9ms TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:28:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177585 states. [2021-07-13 18:28:36,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177585 to 123315. [2021-07-13 18:28:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123315 states, 123313 states have (on average 2.6794498552464057) internal successors, (330411), 123314 states have internal predecessors, (330411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123315 states to 123315 states and 330411 transitions. [2021-07-13 18:28:36,863 INFO L78 Accepts]: Start accepts. Automaton has 123315 states and 330411 transitions. Word has length 442 [2021-07-13 18:28:36,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:36,864 INFO L482 AbstractCegarLoop]: Abstraction has 123315 states and 330411 transitions. [2021-07-13 18:28:36,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:36,864 INFO L276 IsEmpty]: Start isEmpty. Operand 123315 states and 330411 transitions. [2021-07-13 18:28:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:37,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:37,830 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:38,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:38,048 INFO L430 AbstractCegarLoop]: === Iteration 87 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:38,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:38,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1630238286, now seen corresponding path program 39 times [2021-07-13 18:28:38,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:38,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568844540] [2021-07-13 18:28:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:38,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568844540] [2021-07-13 18:28:38,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568844540] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808937845] [2021-07-13 18:28:38,187 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 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 [2021-07-13 18:28:38,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:28:38,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:38,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:39,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808937845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:39,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:39,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:39,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619558902] [2021-07-13 18:28:39,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:39,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:39,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:39,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:39,399 INFO L87 Difference]: Start difference. First operand 123315 states and 330411 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:40,473 INFO L93 Difference]: Finished difference Result 180470 states and 480926 transitions. [2021-07-13 18:28:40,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:28:40,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:28:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:40,878 INFO L225 Difference]: With dead ends: 180470 [2021-07-13 18:28:40,878 INFO L226 Difference]: Without dead ends: 180470 [2021-07-13 18:28:40,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:28:41,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180470 states. [2021-07-13 18:28:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180470 to 126215. [2021-07-13 18:28:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126215 states, 126213 states have (on average 2.680278576691783) internal successors, (338286), 126214 states have internal predecessors, (338286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126215 states to 126215 states and 338286 transitions. [2021-07-13 18:28:45,827 INFO L78 Accepts]: Start accepts. Automaton has 126215 states and 338286 transitions. Word has length 442 [2021-07-13 18:28:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:45,827 INFO L482 AbstractCegarLoop]: Abstraction has 126215 states and 338286 transitions. [2021-07-13 18:28:45,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 126215 states and 338286 transitions. [2021-07-13 18:28:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:46,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:46,063 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:46,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:28:46,281 INFO L430 AbstractCegarLoop]: === Iteration 88 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:46,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:46,282 INFO L82 PathProgramCache]: Analyzing trace with hash -628737748, now seen corresponding path program 40 times [2021-07-13 18:28:46,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:46,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720837500] [2021-07-13 18:28:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:46,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720837500] [2021-07-13 18:28:46,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720837500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271466356] [2021-07-13 18:28:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 18:28:46,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:28:46,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:46,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:46,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:47,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271466356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:47,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:47,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:47,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446921564] [2021-07-13 18:28:47,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:47,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:47,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:47,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:47,833 INFO L87 Difference]: Start difference. First operand 126215 states and 338286 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:48,908 INFO L93 Difference]: Finished difference Result 177810 states and 473410 transitions. [2021-07-13 18:28:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:28:48,909 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:28:48,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:49,336 INFO L225 Difference]: With dead ends: 177810 [2021-07-13 18:28:49,336 INFO L226 Difference]: Without dead ends: 177810 [2021-07-13 18:28:49,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:28:50,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177810 states. [2021-07-13 18:28:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177810 to 129455. [2021-07-13 18:28:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129455 states, 129453 states have (on average 2.6816528006303444) internal successors, (347148), 129454 states have internal predecessors, (347148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129455 states to 129455 states and 347148 transitions. [2021-07-13 18:28:53,799 INFO L78 Accepts]: Start accepts. Automaton has 129455 states and 347148 transitions. Word has length 442 [2021-07-13 18:28:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:28:53,799 INFO L482 AbstractCegarLoop]: Abstraction has 129455 states and 347148 transitions. [2021-07-13 18:28:53,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 129455 states and 347148 transitions. [2021-07-13 18:28:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:28:54,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:28:54,030 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:28:54,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 18:28:54,244 INFO L430 AbstractCegarLoop]: === Iteration 89 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:28:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:28:54,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1754016626, now seen corresponding path program 41 times [2021-07-13 18:28:54,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:28:54,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220603668] [2021-07-13 18:28:54,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:28:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:28:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:54,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:28:54,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220603668] [2021-07-13 18:28:54,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220603668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:54,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826277444] [2021-07-13 18:28:54,996 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 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 [2021-07-13 18:28:55,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:28:55,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:28:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:28:55,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:28:55,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:28:55,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826277444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:28:55,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:28:55,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-07-13 18:28:55,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457811594] [2021-07-13 18:28:55,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:28:55,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:28:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:28:55,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:28:55,835 INFO L87 Difference]: Start difference. First operand 129455 states and 347148 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:28:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:28:56,726 INFO L93 Difference]: Finished difference Result 170990 states and 454159 transitions. [2021-07-13 18:28:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 18:28:56,727 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:28:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:28:57,594 INFO L225 Difference]: With dead ends: 170990 [2021-07-13 18:28:57,594 INFO L226 Difference]: Without dead ends: 170990 [2021-07-13 18:28:57,595 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 18:28:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170990 states. [2021-07-13 18:29:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170990 to 120495. [2021-07-13 18:29:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120495 states, 120493 states have (on average 2.679491754707742) internal successors, (322860), 120494 states have internal predecessors, (322860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120495 states to 120495 states and 322860 transitions. [2021-07-13 18:29:01,239 INFO L78 Accepts]: Start accepts. Automaton has 120495 states and 322860 transitions. Word has length 442 [2021-07-13 18:29:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:01,239 INFO L482 AbstractCegarLoop]: Abstraction has 120495 states and 322860 transitions. [2021-07-13 18:29:01,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 120495 states and 322860 transitions. [2021-07-13 18:29:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:29:01,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:01,470 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:01,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:01,688 INFO L430 AbstractCegarLoop]: === Iteration 90 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:01,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:01,688 INFO L82 PathProgramCache]: Analyzing trace with hash 242782678, now seen corresponding path program 42 times [2021-07-13 18:29:01,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:01,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899923064] [2021-07-13 18:29:01,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:01,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:29:01,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:01,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899923064] [2021-07-13 18:29:01,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899923064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:01,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952424145] [2021-07-13 18:29:01,832 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 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 [2021-07-13 18:29:02,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-13 18:29:02,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:02,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:02,585 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:29:02,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:29:02,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952424145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:02,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:02,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:29:02,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595424515] [2021-07-13 18:29:02,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:29:02,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:02,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:29:02,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:29:02,929 INFO L87 Difference]: Start difference. First operand 120495 states and 322860 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:04,017 INFO L93 Difference]: Finished difference Result 170120 states and 452612 transitions. [2021-07-13 18:29:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:29:04,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:29:04,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:04,400 INFO L225 Difference]: With dead ends: 170120 [2021-07-13 18:29:04,400 INFO L226 Difference]: Without dead ends: 170120 [2021-07-13 18:29:04,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:29:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170120 states. [2021-07-13 18:29:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170120 to 119415. [2021-07-13 18:29:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119415 states, 119413 states have (on average 2.6789880498773164) internal successors, (319906), 119414 states have internal predecessors, (319906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:08,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119415 states to 119415 states and 319906 transitions. [2021-07-13 18:29:08,402 INFO L78 Accepts]: Start accepts. Automaton has 119415 states and 319906 transitions. Word has length 442 [2021-07-13 18:29:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:08,402 INFO L482 AbstractCegarLoop]: Abstraction has 119415 states and 319906 transitions. [2021-07-13 18:29:08,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 119415 states and 319906 transitions. [2021-07-13 18:29:08,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:29:08,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:08,612 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:08,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-07-13 18:29:08,830 INFO L430 AbstractCegarLoop]: === Iteration 91 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:08,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2016193356, now seen corresponding path program 43 times [2021-07-13 18:29:08,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:08,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071959945] [2021-07-13 18:29:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:29:08,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071959945] [2021-07-13 18:29:08,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071959945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:08,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462654501] [2021-07-13 18:29:08,980 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 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 [2021-07-13 18:29:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:09,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:09,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:29:10,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462654501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:10,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:10,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:29:10,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474634799] [2021-07-13 18:29:10,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:29:10,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:10,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:29:10,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:29:10,122 INFO L87 Difference]: Start difference. First operand 119415 states and 319906 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:11,143 INFO L93 Difference]: Finished difference Result 189795 states and 505902 transitions. [2021-07-13 18:29:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:29:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:29:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:12,046 INFO L225 Difference]: With dead ends: 189795 [2021-07-13 18:29:12,046 INFO L226 Difference]: Without dead ends: 189795 [2021-07-13 18:29:12,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 191.2ms TimeCoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:29:12,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189795 states. [2021-07-13 18:29:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189795 to 120495. [2021-07-13 18:29:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120495 states, 120493 states have (on average 2.679491754707742) internal successors, (322860), 120494 states have internal predecessors, (322860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120495 states to 120495 states and 322860 transitions. [2021-07-13 18:29:15,595 INFO L78 Accepts]: Start accepts. Automaton has 120495 states and 322860 transitions. Word has length 442 [2021-07-13 18:29:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:15,595 INFO L482 AbstractCegarLoop]: Abstraction has 120495 states and 322860 transitions. [2021-07-13 18:29:15,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 120495 states and 322860 transitions. [2021-07-13 18:29:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:29:16,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:16,457 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:16,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:16,673 INFO L430 AbstractCegarLoop]: === Iteration 92 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1153495062, now seen corresponding path program 44 times [2021-07-13 18:29:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:16,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236113977] [2021-07-13 18:29:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:29:16,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:16,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236113977] [2021-07-13 18:29:16,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236113977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:16,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187768752] [2021-07-13 18:29:16,812 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 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 [2021-07-13 18:29:16,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:29:16,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:16,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:16,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:29:17,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187768752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:17,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:17,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:29:17,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014210815] [2021-07-13 18:29:17,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:29:17,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:29:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:29:17,358 INFO L87 Difference]: Start difference. First operand 120495 states and 322860 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:18,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:18,311 INFO L93 Difference]: Finished difference Result 163890 states and 435629 transitions. [2021-07-13 18:29:18,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:29:18,312 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:29:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:19,269 INFO L225 Difference]: With dead ends: 163890 [2021-07-13 18:29:19,270 INFO L226 Difference]: Without dead ends: 163890 [2021-07-13 18:29:19,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 331.5ms TimeCoverageRelationStatistics Valid=312, Invalid=948, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:29:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163890 states. [2021-07-13 18:29:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163890 to 125475. [2021-07-13 18:29:21,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125475 states, 125473 states have (on average 2.680409331091151) internal successors, (336319), 125474 states have internal predecessors, (336319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125475 states to 125475 states and 336319 transitions. [2021-07-13 18:29:22,820 INFO L78 Accepts]: Start accepts. Automaton has 125475 states and 336319 transitions. Word has length 442 [2021-07-13 18:29:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:22,820 INFO L482 AbstractCegarLoop]: Abstraction has 125475 states and 336319 transitions. [2021-07-13 18:29:22,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 125475 states and 336319 transitions. [2021-07-13 18:29:23,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:29:23,058 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:23,058 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:23,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:23,274 INFO L430 AbstractCegarLoop]: === Iteration 93 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash -138136298, now seen corresponding path program 45 times [2021-07-13 18:29:23,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:23,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990077163] [2021-07-13 18:29:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:29:23,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:23,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990077163] [2021-07-13 18:29:23,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990077163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:23,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827353814] [2021-07-13 18:29:23,442 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 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 [2021-07-13 18:29:24,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:29:24,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:24,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:24,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:24,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:29:24,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827353814] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:24,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:24,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:29:24,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989046562] [2021-07-13 18:29:24,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:29:24,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:24,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:29:24,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:29:24,639 INFO L87 Difference]: Start difference. First operand 125475 states and 336319 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:25,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:25,627 INFO L93 Difference]: Finished difference Result 171200 states and 455265 transitions. [2021-07-13 18:29:25,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:29:25,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:29:25,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:26,481 INFO L225 Difference]: With dead ends: 171200 [2021-07-13 18:29:26,482 INFO L226 Difference]: Without dead ends: 171200 [2021-07-13 18:29:26,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 18:29:26,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171200 states. [2021-07-13 18:29:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171200 to 127635. [2021-07-13 18:29:29,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127635 states, 127633 states have (on average 2.68133633151301) internal successors, (342227), 127634 states have internal predecessors, (342227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:30,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-07-13 18:29:30,192 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-07-13 18:29:30,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:30,193 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-07-13 18:29:30,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:30,193 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-07-13 18:29:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:29:30,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:30,416 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:30,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:30,634 INFO L430 AbstractCegarLoop]: === Iteration 94 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1263415176, now seen corresponding path program 46 times [2021-07-13 18:29:30,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:30,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869567957] [2021-07-13 18:29:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:29:31,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:31,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869567957] [2021-07-13 18:29:31,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869567957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:31,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383596778] [2021-07-13 18:29:31,505 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 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 [2021-07-13 18:29:32,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:29:32,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:29:32,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383596778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:32,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:32,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:29:32,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334416371] [2021-07-13 18:29:32,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:29:32,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:29:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:29:32,447 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:33,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:33,481 INFO L93 Difference]: Finished difference Result 177035 states and 471099 transitions. [2021-07-13 18:29:33,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:29:33,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:29:33,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:34,328 INFO L225 Difference]: With dead ends: 177035 [2021-07-13 18:29:34,328 INFO L226 Difference]: Without dead ends: 177035 [2021-07-13 18:29:34,328 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 360.1ms TimeCoverageRelationStatistics Valid=314, Invalid=946, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:29:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177035 states. [2021-07-13 18:29:37,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177035 to 127635. [2021-07-13 18:29:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127635 states, 127633 states have (on average 2.68133633151301) internal successors, (342227), 127634 states have internal predecessors, (342227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127635 states to 127635 states and 342227 transitions. [2021-07-13 18:29:37,778 INFO L78 Accepts]: Start accepts. Automaton has 127635 states and 342227 transitions. Word has length 442 [2021-07-13 18:29:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:37,779 INFO L482 AbstractCegarLoop]: Abstraction has 127635 states and 342227 transitions. [2021-07-13 18:29:37,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 127635 states and 342227 transitions. [2021-07-13 18:29:38,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-07-13 18:29:38,003 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:38,004 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:38,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:38,225 INFO L430 AbstractCegarLoop]: === Iteration 95 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:38,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:38,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1878649302, now seen corresponding path program 47 times [2021-07-13 18:29:38,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:38,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278213266] [2021-07-13 18:29:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:38,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1114 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-07-13 18:29:38,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:38,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278213266] [2021-07-13 18:29:38,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278213266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:38,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226761341] [2021-07-13 18:29:38,727 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 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 [2021-07-13 18:29:38,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-13 18:29:38,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:38,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:38,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 24 proven. 1091 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:29:39,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226761341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:39,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:39,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 18 [2021-07-13 18:29:39,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175077222] [2021-07-13 18:29:39,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 18:29:39,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 18:29:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-07-13 18:29:39,413 INFO L87 Difference]: Start difference. First operand 127635 states and 342227 transitions. Second operand has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:40,350 INFO L93 Difference]: Finished difference Result 171770 states and 456242 transitions. [2021-07-13 18:29:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 18:29:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 442 [2021-07-13 18:29:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:41,025 INFO L225 Difference]: With dead ends: 171770 [2021-07-13 18:29:41,025 INFO L226 Difference]: Without dead ends: 171770 [2021-07-13 18:29:41,025 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 18:29:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171770 states. [2021-07-13 18:29:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171770 to 143255. [2021-07-13 18:29:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143255 states, 143253 states have (on average 2.6846069541301056) internal successors, (384578), 143254 states have internal predecessors, (384578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:45,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143255 states to 143255 states and 384578 transitions. [2021-07-13 18:29:45,209 INFO L78 Accepts]: Start accepts. Automaton has 143255 states and 384578 transitions. Word has length 442 [2021-07-13 18:29:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:45,209 INFO L482 AbstractCegarLoop]: Abstraction has 143255 states and 384578 transitions. [2021-07-13 18:29:45,209 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 21.555555555555557) internal successors, (388), 18 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 143255 states and 384578 transitions. [2021-07-13 18:29:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:45,980 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:45,980 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:46,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-07-13 18:29:46,198 INFO L430 AbstractCegarLoop]: === Iteration 96 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:46,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:46,198 INFO L82 PathProgramCache]: Analyzing trace with hash -687059827, now seen corresponding path program 48 times [2021-07-13 18:29:46,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:46,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694915507] [2021-07-13 18:29:46,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694915507] [2021-07-13 18:29:46,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694915507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410014103] [2021-07-13 18:29:46,382 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 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 [2021-07-13 18:29:46,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:29:46,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:29:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:46,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:47,530 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:29:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:47,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410014103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:47,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:47,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:47,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558389237] [2021-07-13 18:29:47,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:47,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:47,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:47,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:47,595 INFO L87 Difference]: Start difference. First operand 143255 states and 384578 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:49,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:49,027 INFO L93 Difference]: Finished difference Result 181095 states and 482560 transitions. [2021-07-13 18:29:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:29:49,027 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:29:49,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:49,450 INFO L225 Difference]: With dead ends: 181095 [2021-07-13 18:29:49,450 INFO L226 Difference]: Without dead ends: 181095 [2021-07-13 18:29:49,451 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=433, Invalid=1373, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:29:49,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181095 states. [2021-07-13 18:29:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181095 to 141435. [2021-07-13 18:29:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141435 states, 141433 states have (on average 2.6843593786457194) internal successors, (379657), 141434 states have internal predecessors, (379657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141435 states to 141435 states and 379657 transitions. [2021-07-13 18:29:53,929 INFO L78 Accepts]: Start accepts. Automaton has 141435 states and 379657 transitions. Word has length 443 [2021-07-13 18:29:53,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:29:53,930 INFO L482 AbstractCegarLoop]: Abstraction has 141435 states and 379657 transitions. [2021-07-13 18:29:53,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:53,930 INFO L276 IsEmpty]: Start isEmpty. Operand 141435 states and 379657 transitions. [2021-07-13 18:29:54,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:29:54,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:29:54,793 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:29:54,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:29:54,999 INFO L430 AbstractCegarLoop]: === Iteration 97 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:29:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:29:55,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1444112891, now seen corresponding path program 49 times [2021-07-13 18:29:55,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:29:55,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375138114] [2021-07-13 18:29:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:29:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:55,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:29:55,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375138114] [2021-07-13 18:29:55,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375138114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:55,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417024484] [2021-07-13 18:29:55,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 18:29:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:29:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:29:55,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:29:55,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:29:55,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417024484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:29:55,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:29:55,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:29:55,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537185050] [2021-07-13 18:29:55,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:29:55,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:29:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:29:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:29:55,672 INFO L87 Difference]: Start difference. First operand 141435 states and 379657 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:29:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:29:57,019 INFO L93 Difference]: Finished difference Result 215205 states and 575027 transitions. [2021-07-13 18:29:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:29:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:29:57,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:29:57,923 INFO L225 Difference]: With dead ends: 215205 [2021-07-13 18:29:57,923 INFO L226 Difference]: Without dead ends: 215205 [2021-07-13 18:29:57,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=420, Invalid=1302, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:29:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215205 states. [2021-07-13 18:30:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215205 to 141435. [2021-07-13 18:30:02,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141435 states, 141433 states have (on average 2.6843593786457194) internal successors, (379657), 141434 states have internal predecessors, (379657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141435 states to 141435 states and 379657 transitions. [2021-07-13 18:30:02,455 INFO L78 Accepts]: Start accepts. Automaton has 141435 states and 379657 transitions. Word has length 443 [2021-07-13 18:30:02,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:02,455 INFO L482 AbstractCegarLoop]: Abstraction has 141435 states and 379657 transitions. [2021-07-13 18:30:02,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:02,455 INFO L276 IsEmpty]: Start isEmpty. Operand 141435 states and 379657 transitions. [2021-07-13 18:30:03,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:03,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:03,600 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:30:03,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 18:30:03,813 INFO L430 AbstractCegarLoop]: === Iteration 98 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:03,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:03,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1725575527, now seen corresponding path program 50 times [2021-07-13 18:30:03,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:03,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941432831] [2021-07-13 18:30:03,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:03,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941432831] [2021-07-13 18:30:03,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941432831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:03,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767391328] [2021-07-13 18:30:03,973 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 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 [2021-07-13 18:30:04,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:30:04,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:04,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767391328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:04,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:04,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080430550] [2021-07-13 18:30:04,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:04,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:04,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:04,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:04,573 INFO L87 Difference]: Start difference. First operand 141435 states and 379657 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:06,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:06,237 INFO L93 Difference]: Finished difference Result 180350 states and 480244 transitions. [2021-07-13 18:30:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:30:06,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:30:06,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:06,747 INFO L225 Difference]: With dead ends: 180350 [2021-07-13 18:30:06,747 INFO L226 Difference]: Without dead ends: 180350 [2021-07-13 18:30:06,747 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=422, Invalid=1300, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:30:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180350 states. [2021-07-13 18:30:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180350 to 138535. [2021-07-13 18:30:11,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138535 states, 138533 states have (on average 2.683707131152866) internal successors, (371782), 138534 states have internal predecessors, (371782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138535 states to 138535 states and 371782 transitions. [2021-07-13 18:30:11,698 INFO L78 Accepts]: Start accepts. Automaton has 138535 states and 371782 transitions. Word has length 443 [2021-07-13 18:30:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:11,698 INFO L482 AbstractCegarLoop]: Abstraction has 138535 states and 371782 transitions. [2021-07-13 18:30:11,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 138535 states and 371782 transitions. [2021-07-13 18:30:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:11,977 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:11,977 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:30:12,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:12,195 INFO L430 AbstractCegarLoop]: === Iteration 99 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:12,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:12,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1874991501, now seen corresponding path program 51 times [2021-07-13 18:30:12,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:12,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318620307] [2021-07-13 18:30:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:13,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:13,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:13,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318620307] [2021-07-13 18:30:13,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318620307] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:13,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759413458] [2021-07-13 18:30:13,095 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 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 [2021-07-13 18:30:13,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:30:13,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:13,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759413458] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:13,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:13,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:13,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482428202] [2021-07-13 18:30:13,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:13,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:13,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:13,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:13,912 INFO L87 Difference]: Start difference. First operand 138535 states and 371782 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:15,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:15,551 INFO L93 Difference]: Finished difference Result 214110 states and 571753 transitions. [2021-07-13 18:30:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:30:15,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:30:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:16,137 INFO L225 Difference]: With dead ends: 214110 [2021-07-13 18:30:16,137 INFO L226 Difference]: Without dead ends: 214110 [2021-07-13 18:30:16,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:30:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214110 states. [2021-07-13 18:30:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214110 to 138535. [2021-07-13 18:30:20,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138535 states, 138533 states have (on average 2.683707131152866) internal successors, (371782), 138534 states have internal predecessors, (371782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138535 states to 138535 states and 371782 transitions. [2021-07-13 18:30:20,416 INFO L78 Accepts]: Start accepts. Automaton has 138535 states and 371782 transitions. Word has length 443 [2021-07-13 18:30:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:20,416 INFO L482 AbstractCegarLoop]: Abstraction has 138535 states and 371782 transitions. [2021-07-13 18:30:20,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:20,417 INFO L276 IsEmpty]: Start isEmpty. Operand 138535 states and 371782 transitions. [2021-07-13 18:30:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:21,138 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:21,138 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:30:21,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:21,357 INFO L430 AbstractCegarLoop]: === Iteration 100 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:21,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 749712623, now seen corresponding path program 52 times [2021-07-13 18:30:21,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:21,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851367598] [2021-07-13 18:30:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:21,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851367598] [2021-07-13 18:30:21,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851367598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:21,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716703395] [2021-07-13 18:30:21,512 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 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 [2021-07-13 18:30:22,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:30:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:22,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:22,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:22,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716703395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:22,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:22,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:22,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495543646] [2021-07-13 18:30:22,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:22,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:22,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:22,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:22,615 INFO L87 Difference]: Start difference. First operand 138535 states and 371782 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:22,911 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-07-13 18:30:24,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:24,251 INFO L93 Difference]: Finished difference Result 226060 states and 604582 transitions. [2021-07-13 18:30:24,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:30:24,251 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:30:24,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:24,848 INFO L225 Difference]: With dead ends: 226060 [2021-07-13 18:30:24,848 INFO L226 Difference]: Without dead ends: 226060 [2021-07-13 18:30:24,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 427.6ms TimeCoverageRelationStatistics Valid=409, Invalid=1231, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:30:25,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226060 states. [2021-07-13 18:30:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226060 to 137455. [2021-07-13 18:30:28,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137455 states, 137453 states have (on average 2.683302656180658) internal successors, (368828), 137454 states have internal predecessors, (368828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137455 states to 137455 states and 368828 transitions. [2021-07-13 18:30:29,267 INFO L78 Accepts]: Start accepts. Automaton has 137455 states and 368828 transitions. Word has length 443 [2021-07-13 18:30:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:29,267 INFO L482 AbstractCegarLoop]: Abstraction has 137455 states and 368828 transitions. [2021-07-13 18:30:29,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 137455 states and 368828 transitions. [2021-07-13 18:30:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:30,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:30,274 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:30:30,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 18:30:30,489 INFO L430 AbstractCegarLoop]: === Iteration 101 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:30,489 INFO L82 PathProgramCache]: Analyzing trace with hash -403190195, now seen corresponding path program 53 times [2021-07-13 18:30:30,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:30,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853315269] [2021-07-13 18:30:30,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:30,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:30,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853315269] [2021-07-13 18:30:30,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853315269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:30,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299276161] [2021-07-13 18:30:30,649 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 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 [2021-07-13 18:30:30,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:30:30,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:30,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:30,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:31,551 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:30:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:31,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299276161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:31,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:31,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:31,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135927440] [2021-07-13 18:30:31,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:31,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:31,685 INFO L87 Difference]: Start difference. First operand 137455 states and 368828 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:32,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:32,872 INFO L93 Difference]: Finished difference Result 174995 states and 465521 transitions. [2021-07-13 18:30:32,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:30:32,873 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:30:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:33,284 INFO L225 Difference]: With dead ends: 174995 [2021-07-13 18:30:33,284 INFO L226 Difference]: Without dead ends: 174995 [2021-07-13 18:30:33,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 256.7ms TimeCoverageRelationStatistics Valid=411, Invalid=1229, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:30:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174995 states. [2021-07-13 18:30:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174995 to 137715. [2021-07-13 18:30:36,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137715 states, 137713 states have (on average 2.683050982841126) internal successors, (369491), 137714 states have internal predecessors, (369491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137715 states to 137715 states and 369491 transitions. [2021-07-13 18:30:37,478 INFO L78 Accepts]: Start accepts. Automaton has 137715 states and 369491 transitions. Word has length 443 [2021-07-13 18:30:37,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:37,478 INFO L482 AbstractCegarLoop]: Abstraction has 137715 states and 369491 transitions. [2021-07-13 18:30:37,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 137715 states and 369491 transitions. [2021-07-13 18:30:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:37,726 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:37,727 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:30:37,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 18:30:37,940 INFO L430 AbstractCegarLoop]: === Iteration 102 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1925469947, now seen corresponding path program 54 times [2021-07-13 18:30:37,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:37,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288208705] [2021-07-13 18:30:37,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:38,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:38,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288208705] [2021-07-13 18:30:38,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288208705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:38,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073223399] [2021-07-13 18:30:38,169 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 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 [2021-07-13 18:30:38,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:30:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:38,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:38,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:39,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073223399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:39,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:39,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:39,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225796174] [2021-07-13 18:30:39,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:39,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:39,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:39,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:39,369 INFO L87 Difference]: Start difference. First operand 137715 states and 369491 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:40,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:40,596 INFO L93 Difference]: Finished difference Result 210545 states and 561473 transitions. [2021-07-13 18:30:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:30:40,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:30:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:41,465 INFO L225 Difference]: With dead ends: 210545 [2021-07-13 18:30:41,465 INFO L226 Difference]: Without dead ends: 210545 [2021-07-13 18:30:41,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:30:41,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210545 states. [2021-07-13 18:30:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210545 to 138795. [2021-07-13 18:30:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138795 states, 138793 states have (on average 2.6834566584770125) internal successors, (372445), 138794 states have internal predecessors, (372445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138795 states to 138795 states and 372445 transitions. [2021-07-13 18:30:45,678 INFO L78 Accepts]: Start accepts. Automaton has 138795 states and 372445 transitions. Word has length 443 [2021-07-13 18:30:45,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:45,678 INFO L482 AbstractCegarLoop]: Abstraction has 138795 states and 372445 transitions. [2021-07-13 18:30:45,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 138795 states and 372445 transitions. [2021-07-13 18:30:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:45,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:45,926 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:30:46,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:30:46,145 INFO L430 AbstractCegarLoop]: === Iteration 103 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:46,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:46,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1244218471, now seen corresponding path program 55 times [2021-07-13 18:30:46,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:46,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025567858] [2021-07-13 18:30:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:46,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:46,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:46,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025567858] [2021-07-13 18:30:46,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025567858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:46,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984652053] [2021-07-13 18:30:46,390 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 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 [2021-07-13 18:30:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:47,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984652053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:47,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:47,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:47,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333840890] [2021-07-13 18:30:47,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:47,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:47,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:47,296 INFO L87 Difference]: Start difference. First operand 138795 states and 372445 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:48,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:48,790 INFO L93 Difference]: Finished difference Result 226775 states and 605776 transitions. [2021-07-13 18:30:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:30:48,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:30:48,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:49,387 INFO L225 Difference]: With dead ends: 226775 [2021-07-13 18:30:49,387 INFO L226 Difference]: Without dead ends: 226775 [2021-07-13 18:30:49,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=408, Invalid=1232, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:30:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226775 states. [2021-07-13 18:30:53,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226775 to 136635. [2021-07-13 18:30:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136635 states, 136633 states have (on average 2.6826388939714416) internal successors, (366537), 136634 states have internal predecessors, (366537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136635 states to 136635 states and 366537 transitions. [2021-07-13 18:30:53,725 INFO L78 Accepts]: Start accepts. Automaton has 136635 states and 366537 transitions. Word has length 443 [2021-07-13 18:30:53,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:30:53,725 INFO L482 AbstractCegarLoop]: Abstraction has 136635 states and 366537 transitions. [2021-07-13 18:30:53,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:53,726 INFO L276 IsEmpty]: Start isEmpty. Operand 136635 states and 366537 transitions. [2021-07-13 18:30:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:30:53,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:30:53,973 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:30:54,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 18:30:54,191 INFO L430 AbstractCegarLoop]: === Iteration 104 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:30:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:30:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash 91315653, now seen corresponding path program 56 times [2021-07-13 18:30:54,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:30:54,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956873711] [2021-07-13 18:30:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:30:54,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:30:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:55,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:30:55,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956873711] [2021-07-13 18:30:55,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956873711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:55,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213828989] [2021-07-13 18:30:55,104 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 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 [2021-07-13 18:30:55,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:30:55,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:30:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:30:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:30:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:30:55,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213828989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:30:55,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:30:55,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:30:55,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876987609] [2021-07-13 18:30:55,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:30:55,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:30:55,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:30:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:30:55,705 INFO L87 Difference]: Start difference. First operand 136635 states and 366537 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:30:57,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:30:57,377 INFO L93 Difference]: Finished difference Result 227105 states and 606454 transitions. [2021-07-13 18:30:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:30:57,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:30:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:30:57,961 INFO L225 Difference]: With dead ends: 227105 [2021-07-13 18:30:57,961 INFO L226 Difference]: Without dead ends: 227105 [2021-07-13 18:30:57,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=398, Invalid=1162, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:30:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227105 states. [2021-07-13 18:31:01,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227105 to 142095. [2021-07-13 18:31:02,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142095 states, 142093 states have (on average 2.6834537943459567) internal successors, (381300), 142094 states have internal predecessors, (381300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142095 states to 142095 states and 381300 transitions. [2021-07-13 18:31:02,913 INFO L78 Accepts]: Start accepts. Automaton has 142095 states and 381300 transitions. Word has length 443 [2021-07-13 18:31:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:02,913 INFO L482 AbstractCegarLoop]: Abstraction has 142095 states and 381300 transitions. [2021-07-13 18:31:02,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 142095 states and 381300 transitions. [2021-07-13 18:31:03,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:03,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:03,156 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:31:03,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 18:31:03,373 INFO L430 AbstractCegarLoop]: === Iteration 105 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash 551638951, now seen corresponding path program 57 times [2021-07-13 18:31:03,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:03,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479965076] [2021-07-13 18:31:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:03,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:03,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:03,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479965076] [2021-07-13 18:31:03,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479965076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:03,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108945294] [2021-07-13 18:31:03,526 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 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 [2021-07-13 18:31:03,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:31:03,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:03,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:04,327 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:31:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:04,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108945294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:04,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:04,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:04,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151738323] [2021-07-13 18:31:04,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:04,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:04,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:04,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:04,532 INFO L87 Difference]: Start difference. First operand 142095 states and 381300 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:05,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:05,555 INFO L93 Difference]: Finished difference Result 175900 states and 466844 transitions. [2021-07-13 18:31:05,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:31:05,556 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:31:05,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:05,964 INFO L225 Difference]: With dead ends: 175900 [2021-07-13 18:31:05,964 INFO L226 Difference]: Without dead ends: 175900 [2021-07-13 18:31:05,964 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 229.4ms TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:31:06,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175900 states. [2021-07-13 18:31:09,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175900 to 147415. [2021-07-13 18:31:09,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147415 states, 147413 states have (on average 2.684607192038694) internal successors, (395746), 147414 states have internal predecessors, (395746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:10,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147415 states to 147415 states and 395746 transitions. [2021-07-13 18:31:10,929 INFO L78 Accepts]: Start accepts. Automaton has 147415 states and 395746 transitions. Word has length 443 [2021-07-13 18:31:10,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:10,929 INFO L482 AbstractCegarLoop]: Abstraction has 147415 states and 395746 transitions. [2021-07-13 18:31:10,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:10,929 INFO L276 IsEmpty]: Start isEmpty. Operand 147415 states and 395746 transitions. [2021-07-13 18:31:11,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:11,211 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:11,212 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:31:11,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 18:31:11,430 INFO L430 AbstractCegarLoop]: === Iteration 106 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:11,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1019074931, now seen corresponding path program 58 times [2021-07-13 18:31:11,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:11,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220877909] [2021-07-13 18:31:11,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:11,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:11,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:11,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220877909] [2021-07-13 18:31:11,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220877909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:11,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700023700] [2021-07-13 18:31:11,700 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 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 [2021-07-13 18:31:12,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:31:12,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:12,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:13,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700023700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:13,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:13,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:13,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052255396] [2021-07-13 18:31:13,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:13,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:13,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:13,042 INFO L87 Difference]: Start difference. First operand 147415 states and 395746 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:14,174 INFO L93 Difference]: Finished difference Result 201235 states and 536688 transitions. [2021-07-13 18:31:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:31:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:31:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:14,967 INFO L225 Difference]: With dead ends: 201235 [2021-07-13 18:31:14,967 INFO L226 Difference]: Without dead ends: 201235 [2021-07-13 18:31:14,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 282.5ms TimeCoverageRelationStatistics Valid=417, Invalid=1305, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:31:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201235 states. [2021-07-13 18:31:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201235 to 149575. [2021-07-13 18:31:19,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149575 states, 149573 states have (on average 2.685337594351922) internal successors, (401654), 149574 states have internal predecessors, (401654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149575 states to 149575 states and 401654 transitions. [2021-07-13 18:31:19,713 INFO L78 Accepts]: Start accepts. Automaton has 149575 states and 401654 transitions. Word has length 443 [2021-07-13 18:31:19,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:19,713 INFO L482 AbstractCegarLoop]: Abstraction has 149575 states and 401654 transitions. [2021-07-13 18:31:19,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 149575 states and 401654 transitions. [2021-07-13 18:31:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:19,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:19,983 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:31:20,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:20,197 INFO L430 AbstractCegarLoop]: === Iteration 107 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:20,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2144353809, now seen corresponding path program 59 times [2021-07-13 18:31:20,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:20,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058986115] [2021-07-13 18:31:20,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:20,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:20,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058986115] [2021-07-13 18:31:20,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058986115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:20,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636711408] [2021-07-13 18:31:20,773 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 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 [2021-07-13 18:31:21,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:31:21,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:21,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:21,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636711408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:21,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:21,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:21,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679542123] [2021-07-13 18:31:21,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:21,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:21,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:21,682 INFO L87 Difference]: Start difference. First operand 149575 states and 401654 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:22,039 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 18:31:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:23,211 INFO L93 Difference]: Finished difference Result 213830 states and 570872 transitions. [2021-07-13 18:31:23,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 18:31:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:31:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:23,819 INFO L225 Difference]: With dead ends: 213830 [2021-07-13 18:31:23,819 INFO L226 Difference]: Without dead ends: 213830 [2021-07-13 18:31:23,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:31:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213830 states. [2021-07-13 18:31:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213830 to 148495. [2021-07-13 18:31:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148495 states, 148493 states have (on average 2.6849750493289246) internal successors, (398700), 148494 states have internal predecessors, (398700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148495 states to 148495 states and 398700 transitions. [2021-07-13 18:31:28,303 INFO L78 Accepts]: Start accepts. Automaton has 148495 states and 398700 transitions. Word has length 443 [2021-07-13 18:31:28,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:28,303 INFO L482 AbstractCegarLoop]: Abstraction has 148495 states and 398700 transitions. [2021-07-13 18:31:28,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 148495 states and 398700 transitions. [2021-07-13 18:31:28,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:28,975 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:28,975 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:31:29,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-13 18:31:29,192 INFO L430 AbstractCegarLoop]: === Iteration 108 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:29,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash 997710669, now seen corresponding path program 60 times [2021-07-13 18:31:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:29,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110942070] [2021-07-13 18:31:29,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:29,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:29,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110942070] [2021-07-13 18:31:29,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110942070] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:29,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418311183] [2021-07-13 18:31:29,349 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 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 [2021-07-13 18:31:29,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:31:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:29,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:30,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418311183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:30,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:30,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:30,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40650461] [2021-07-13 18:31:30,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:30,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:30,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:30,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:30,524 INFO L87 Difference]: Start difference. First operand 148495 states and 398700 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:31,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:31,907 INFO L93 Difference]: Finished difference Result 224125 states and 598255 transitions. [2021-07-13 18:31:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:31:31,907 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:31:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:32,491 INFO L225 Difference]: With dead ends: 224125 [2021-07-13 18:31:32,491 INFO L226 Difference]: Without dead ends: 224125 [2021-07-13 18:31:32,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=397, Invalid=1163, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:31:33,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224125 states. [2021-07-13 18:31:36,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224125 to 152135. [2021-07-13 18:31:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152135 states, 152133 states have (on average 2.6854265675428737) internal successors, (408542), 152134 states have internal predecessors, (408542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152135 states to 152135 states and 408542 transitions. [2021-07-13 18:31:37,722 INFO L78 Accepts]: Start accepts. Automaton has 152135 states and 408542 transitions. Word has length 443 [2021-07-13 18:31:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:37,722 INFO L482 AbstractCegarLoop]: Abstraction has 152135 states and 408542 transitions. [2021-07-13 18:31:37,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:37,722 INFO L276 IsEmpty]: Start isEmpty. Operand 152135 states and 408542 transitions. [2021-07-13 18:31:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:38,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:38,017 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:31:38,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 18:31:38,236 INFO L430 AbstractCegarLoop]: === Iteration 109 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1458033967, now seen corresponding path program 61 times [2021-07-13 18:31:38,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:38,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433281186] [2021-07-13 18:31:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:38,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:38,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433281186] [2021-07-13 18:31:38,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433281186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:38,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681002137] [2021-07-13 18:31:38,816 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 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 [2021-07-13 18:31:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:39,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:39,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681002137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:39,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:39,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:39,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741256483] [2021-07-13 18:31:39,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:39,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:39,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:39,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:39,393 INFO L87 Difference]: Start difference. First operand 152135 states and 408542 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:40,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:40,825 INFO L93 Difference]: Finished difference Result 215735 states and 575934 transitions. [2021-07-13 18:31:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:31:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:31:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:41,801 INFO L225 Difference]: With dead ends: 215735 [2021-07-13 18:31:41,801 INFO L226 Difference]: Without dead ends: 215735 [2021-07-13 18:31:41,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=387, Invalid=1095, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:31:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215735 states. [2021-07-13 18:31:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215735 to 155035. [2021-07-13 18:31:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155035 states, 155033 states have (on average 2.685989434507492) internal successors, (416417), 155034 states have internal predecessors, (416417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155035 states to 155035 states and 416417 transitions. [2021-07-13 18:31:45,818 INFO L78 Accepts]: Start accepts. Automaton has 155035 states and 416417 transitions. Word has length 443 [2021-07-13 18:31:45,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:45,819 INFO L482 AbstractCegarLoop]: Abstraction has 155035 states and 416417 transitions. [2021-07-13 18:31:45,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 155035 states and 416417 transitions. [2021-07-13 18:31:46,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:46,512 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:46,521 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:31:46,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:46,739 INFO L430 AbstractCegarLoop]: === Iteration 110 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:46,740 INFO L82 PathProgramCache]: Analyzing trace with hash -356712435, now seen corresponding path program 62 times [2021-07-13 18:31:46,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:46,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161026577] [2021-07-13 18:31:46,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:46,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:46,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161026577] [2021-07-13 18:31:46,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161026577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:46,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699282071] [2021-07-13 18:31:46,897 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 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 [2021-07-13 18:31:47,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:31:47,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:47,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:47,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:47,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:47,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699282071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:47,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:47,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-07-13 18:31:47,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232523849] [2021-07-13 18:31:47,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:47,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:47,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:47,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:47,478 INFO L87 Difference]: Start difference. First operand 155035 states and 416417 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:48,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:48,884 INFO L93 Difference]: Finished difference Result 184590 states and 490845 transitions. [2021-07-13 18:31:48,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:31:48,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:31:48,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:49,307 INFO L225 Difference]: With dead ends: 184590 [2021-07-13 18:31:49,307 INFO L226 Difference]: Without dead ends: 184590 [2021-07-13 18:31:49,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=389, Invalid=1093, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:31:49,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184590 states. [2021-07-13 18:31:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184590 to 157195. [2021-07-13 18:31:53,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-07-13 18:31:53,855 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 443 [2021-07-13 18:31:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:31:53,856 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-07-13 18:31:53,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-07-13 18:31:54,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:31:54,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:31:54,580 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:31:54,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:31:54,797 INFO L430 AbstractCegarLoop]: === Iteration 111 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:31:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:31:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1080525819, now seen corresponding path program 63 times [2021-07-13 18:31:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:31:54,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061161977] [2021-07-13 18:31:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:31:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:31:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:31:54,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:31:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061161977] [2021-07-13 18:31:54,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061161977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:54,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688428748] [2021-07-13 18:31:54,964 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 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 [2021-07-13 18:31:55,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-13 18:31:55,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:31:55,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:31:55,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:31:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:31:55,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688428748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:31:55,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:31:55,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:31:55,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707387746] [2021-07-13 18:31:55,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:31:55,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:31:55,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:31:55,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:31:55,849 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:31:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:31:57,267 INFO L93 Difference]: Finished difference Result 194125 states and 517955 transitions. [2021-07-13 18:31:57,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:31:57,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:31:57,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:31:57,765 INFO L225 Difference]: With dead ends: 194125 [2021-07-13 18:31:57,766 INFO L226 Difference]: Without dead ends: 194125 [2021-07-13 18:31:57,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 302.7ms TimeCoverageRelationStatistics Valid=496, Invalid=1484, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:31:58,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194125 states. [2021-07-13 18:32:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194125 to 158275. [2021-07-13 18:32:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158275 states, 158273 states have (on average 2.6869965186734315) internal successors, (425279), 158274 states have internal predecessors, (425279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:02,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158275 states to 158275 states and 425279 transitions. [2021-07-13 18:32:02,162 INFO L78 Accepts]: Start accepts. Automaton has 158275 states and 425279 transitions. Word has length 443 [2021-07-13 18:32:02,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:02,163 INFO L482 AbstractCegarLoop]: Abstraction has 158275 states and 425279 transitions. [2021-07-13 18:32:02,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:02,163 INFO L276 IsEmpty]: Start isEmpty. Operand 158275 states and 425279 transitions. [2021-07-13 18:32:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:32:02,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:02,456 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:32:02,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:02,669 INFO L430 AbstractCegarLoop]: === Iteration 112 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:02,669 INFO L82 PathProgramCache]: Analyzing trace with hash 2089162599, now seen corresponding path program 64 times [2021-07-13 18:32:02,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:02,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825224067] [2021-07-13 18:32:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:32:02,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:02,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825224067] [2021-07-13 18:32:02,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825224067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:02,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233657260] [2021-07-13 18:32:02,841 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 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 [2021-07-13 18:32:03,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:32:03,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:32:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:03,718 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:32:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:32:04,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233657260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:04,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:04,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:32:04,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025858794] [2021-07-13 18:32:04,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:32:04,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:04,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:32:04,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:32:04,057 INFO L87 Difference]: Start difference. First operand 158275 states and 425279 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:05,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:05,276 INFO L93 Difference]: Finished difference Result 202530 states and 540291 transitions. [2021-07-13 18:32:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:32:05,276 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:32:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:06,184 INFO L225 Difference]: With dead ends: 202530 [2021-07-13 18:32:06,184 INFO L226 Difference]: Without dead ends: 202530 [2021-07-13 18:32:06,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:32:06,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202530 states. [2021-07-13 18:32:09,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202530 to 157195. [2021-07-13 18:32:10,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-07-13 18:32:11,208 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 443 [2021-07-13 18:32:11,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:11,208 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-07-13 18:32:11,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:11,208 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-07-13 18:32:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:32:11,495 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:11,495 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:32:11,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:11,714 INFO L430 AbstractCegarLoop]: === Iteration 113 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:11,714 INFO L82 PathProgramCache]: Analyzing trace with hash 936259781, now seen corresponding path program 65 times [2021-07-13 18:32:11,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:11,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001582846] [2021-07-13 18:32:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:32:12,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001582846] [2021-07-13 18:32:12,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001582846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914317638] [2021-07-13 18:32:12,385 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 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 [2021-07-13 18:32:12,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:32:12,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:32:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:32:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914317638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:13,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:13,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:32:13,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315739458] [2021-07-13 18:32:13,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:32:13,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:13,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:32:13,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:32:13,068 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:14,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:14,296 INFO L93 Difference]: Finished difference Result 208415 states and 555982 transitions. [2021-07-13 18:32:14,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:32:14,296 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:32:14,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:15,070 INFO L225 Difference]: With dead ends: 208415 [2021-07-13 18:32:15,070 INFO L226 Difference]: Without dead ends: 208415 [2021-07-13 18:32:15,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 331.1ms TimeCoverageRelationStatistics Valid=474, Invalid=1332, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 18:32:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208415 states. [2021-07-13 18:32:18,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208415 to 156115. [2021-07-13 18:32:18,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156115 states, 156113 states have (on average 2.6863297739457956) internal successors, (419371), 156114 states have internal predecessors, (419371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156115 states to 156115 states and 419371 transitions. [2021-07-13 18:32:19,100 INFO L78 Accepts]: Start accepts. Automaton has 156115 states and 419371 transitions. Word has length 443 [2021-07-13 18:32:19,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:19,100 INFO L482 AbstractCegarLoop]: Abstraction has 156115 states and 419371 transitions. [2021-07-13 18:32:19,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 156115 states and 419371 transitions. [2021-07-13 18:32:19,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:32:19,799 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:19,799 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:32:20,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 18:32:20,016 INFO L430 AbstractCegarLoop]: === Iteration 114 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:20,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:20,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1396583079, now seen corresponding path program 66 times [2021-07-13 18:32:20,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:20,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989213171] [2021-07-13 18:32:20,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:32:20,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:20,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989213171] [2021-07-13 18:32:20,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989213171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:20,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227238017] [2021-07-13 18:32:20,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 18:32:20,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:32:20,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:20,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:32:20,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:32:21,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227238017] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:21,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:21,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:32:21,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964403213] [2021-07-13 18:32:21,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:32:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:32:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:32:21,115 INFO L87 Difference]: Start difference. First operand 156115 states and 419371 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:22,659 INFO L93 Difference]: Finished difference Result 204375 states and 544297 transitions. [2021-07-13 18:32:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:32:22,660 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:32:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:23,240 INFO L225 Difference]: With dead ends: 204375 [2021-07-13 18:32:23,240 INFO L226 Difference]: Without dead ends: 204375 [2021-07-13 18:32:23,240 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 18:32:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204375 states. [2021-07-13 18:32:26,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204375 to 160835. [2021-07-13 18:32:26,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:27,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-07-13 18:32:27,773 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 443 [2021-07-13 18:32:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:27,774 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-07-13 18:32:27,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:27,774 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-07-13 18:32:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:32:28,064 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:28,064 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:32:28,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 18:32:28,282 INFO L430 AbstractCegarLoop]: === Iteration 115 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:28,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:28,282 INFO L82 PathProgramCache]: Analyzing trace with hash -418163323, now seen corresponding path program 67 times [2021-07-13 18:32:28,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:28,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492551831] [2021-07-13 18:32:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:32:28,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:28,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492551831] [2021-07-13 18:32:28,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492551831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:28,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651504708] [2021-07-13 18:32:28,459 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 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 [2021-07-13 18:32:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:28,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:32:28,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:32:29,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651504708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:29,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:29,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:32:29,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872968499] [2021-07-13 18:32:29,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:32:29,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:29,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:32:29,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:32:29,318 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:30,542 INFO L93 Difference]: Finished difference Result 203605 states and 542647 transitions. [2021-07-13 18:32:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:32:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:32:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:31,390 INFO L225 Difference]: With dead ends: 203605 [2021-07-13 18:32:31,390 INFO L226 Difference]: Without dead ends: 203605 [2021-07-13 18:32:31,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:32:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203605 states. [2021-07-13 18:32:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203605 to 160835. [2021-07-13 18:32:35,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-07-13 18:32:35,679 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 443 [2021-07-13 18:32:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:35,680 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-07-13 18:32:35,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-07-13 18:32:36,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2021-07-13 18:32:36,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:36,402 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:32:36,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-07-13 18:32:36,605 INFO L430 AbstractCegarLoop]: === Iteration 116 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1993290265, now seen corresponding path program 68 times [2021-07-13 18:32:36,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:36,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722458839] [2021-07-13 18:32:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1379 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-07-13 18:32:36,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:36,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722458839] [2021-07-13 18:32:36,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722458839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:36,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044971259] [2021-07-13 18:32:36,775 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 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 [2021-07-13 18:32:36,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:32:36,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:36,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:32:36,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:37,307 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:32:37,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 27 proven. 1356 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-07-13 18:32:37,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044971259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:37,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:37,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2021-07-13 18:32:37,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284497811] [2021-07-13 18:32:37,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 18:32:37,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:37,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 18:32:37,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-13 18:32:37,482 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:38,740 INFO L93 Difference]: Finished difference Result 189335 states and 504332 transitions. [2021-07-13 18:32:38,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 18:32:38,741 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 443 [2021-07-13 18:32:38,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:39,211 INFO L225 Difference]: With dead ends: 189335 [2021-07-13 18:32:39,211 INFO L226 Difference]: Without dead ends: 189335 [2021-07-13 18:32:39,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=454, Invalid=1186, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 18:32:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189335 states. [2021-07-13 18:32:43,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189335 to 162995. [2021-07-13 18:32:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162995 states, 162993 states have (on average 2.6876921094770942) internal successors, (438075), 162994 states have internal predecessors, (438075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162995 states to 162995 states and 438075 transitions. [2021-07-13 18:32:44,606 INFO L78 Accepts]: Start accepts. Automaton has 162995 states and 438075 transitions. Word has length 443 [2021-07-13 18:32:44,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:44,607 INFO L482 AbstractCegarLoop]: Abstraction has 162995 states and 438075 transitions. [2021-07-13 18:32:44,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:44,607 INFO L276 IsEmpty]: Start isEmpty. Operand 162995 states and 438075 transitions. [2021-07-13 18:32:44,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:32:44,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:44,970 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:32:45,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:32:45,188 INFO L430 AbstractCegarLoop]: === Iteration 117 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:45,188 INFO L82 PathProgramCache]: Analyzing trace with hash 873587028, now seen corresponding path program 34 times [2021-07-13 18:32:45,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:45,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022250798] [2021-07-13 18:32:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:45,634 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-07-13 18:32:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:32:45,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022250798] [2021-07-13 18:32:45,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022250798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:45,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317301312] [2021-07-13 18:32:45,752 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 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 [2021-07-13 18:32:46,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:32:46,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:46,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:32:46,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:32:47,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317301312] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:47,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:47,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:32:47,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807663393] [2021-07-13 18:32:47,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:32:47,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:47,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:32:47,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:32:47,333 INFO L87 Difference]: Start difference. First operand 162995 states and 438075 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:49,155 INFO L93 Difference]: Finished difference Result 190380 states and 508089 transitions. [2021-07-13 18:32:49,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 18:32:49,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:32:49,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:49,788 INFO L225 Difference]: With dead ends: 190380 [2021-07-13 18:32:49,788 INFO L226 Difference]: Without dead ends: 190380 [2021-07-13 18:32:49,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 488.8ms TimeCoverageRelationStatistics Valid=634, Invalid=1916, Unknown=0, NotChecked=0, Total=2550 [2021-07-13 18:32:50,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190380 states. [2021-07-13 18:32:53,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190380 to 161915. [2021-07-13 18:32:53,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161915 states, 161913 states have (on average 2.6873753188440705) internal successors, (435121), 161914 states have internal predecessors, (435121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161915 states to 161915 states and 435121 transitions. [2021-07-13 18:32:54,771 INFO L78 Accepts]: Start accepts. Automaton has 161915 states and 435121 transitions. Word has length 444 [2021-07-13 18:32:54,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:32:54,772 INFO L482 AbstractCegarLoop]: Abstraction has 161915 states and 435121 transitions. [2021-07-13 18:32:54,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 161915 states and 435121 transitions. [2021-07-13 18:32:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:32:55,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:32:55,110 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:32:55,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-13 18:32:55,314 INFO L430 AbstractCegarLoop]: === Iteration 118 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:32:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:32:55,315 INFO L82 PathProgramCache]: Analyzing trace with hash -410716848, now seen corresponding path program 35 times [2021-07-13 18:32:55,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:32:55,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830461558] [2021-07-13 18:32:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:32:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:32:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:32:55,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:32:55,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830461558] [2021-07-13 18:32:55,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830461558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:55,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017809235] [2021-07-13 18:32:55,572 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 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 [2021-07-13 18:32:56,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 18:32:56,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:32:56,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:32:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:32:56,453 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:32:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:32:56,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017809235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:32:56,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:32:56,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:32:56,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421439893] [2021-07-13 18:32:56,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:32:56,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:32:56,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:32:56,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:32:56,771 INFO L87 Difference]: Start difference. First operand 161915 states and 435121 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:32:57,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:32:57,934 INFO L93 Difference]: Finished difference Result 195055 states and 519894 transitions. [2021-07-13 18:32:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 18:32:57,935 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:32:57,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:32:58,994 INFO L225 Difference]: With dead ends: 195055 [2021-07-13 18:32:58,995 INFO L226 Difference]: Without dead ends: 195055 [2021-07-13 18:32:58,995 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=622, Invalid=1828, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 18:32:59,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195055 states. [2021-07-13 18:33:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195055 to 160835. [2021-07-13 18:33:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160835 states, 160833 states have (on average 2.6870542736876137) internal successors, (432167), 160834 states have internal predecessors, (432167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160835 states to 160835 states and 432167 transitions. [2021-07-13 18:33:04,312 INFO L78 Accepts]: Start accepts. Automaton has 160835 states and 432167 transitions. Word has length 444 [2021-07-13 18:33:04,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:33:04,313 INFO L482 AbstractCegarLoop]: Abstraction has 160835 states and 432167 transitions. [2021-07-13 18:33:04,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 160835 states and 432167 transitions. [2021-07-13 18:33:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:33:05,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:33:05,059 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:33:05,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:33:05,277 INFO L430 AbstractCegarLoop]: === Iteration 119 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:33:05,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:33:05,277 INFO L82 PathProgramCache]: Analyzing trace with hash -962822188, now seen corresponding path program 36 times [2021-07-13 18:33:05,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:33:05,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843213201] [2021-07-13 18:33:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:33:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:05,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:33:05,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843213201] [2021-07-13 18:33:05,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843213201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:05,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793090223] [2021-07-13 18:33:05,464 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 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 [2021-07-13 18:33:05,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 18:33:05,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:33:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:33:05,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:33:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:06,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793090223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:06,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:33:06,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:33:06,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553791625] [2021-07-13 18:33:06,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:33:06,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:33:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:33:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:33:06,469 INFO L87 Difference]: Start difference. First operand 160835 states and 432167 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:07,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:33:07,742 INFO L93 Difference]: Finished difference Result 200050 states and 532784 transitions. [2021-07-13 18:33:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 18:33:07,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:33:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:33:08,566 INFO L225 Difference]: With dead ends: 200050 [2021-07-13 18:33:08,567 INFO L226 Difference]: Without dead ends: 200050 [2021-07-13 18:33:08,567 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 18:33:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200050 states. [2021-07-13 18:33:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200050 to 159015. [2021-07-13 18:33:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159015 states, 159013 states have (on average 2.6868620804588303) internal successors, (427246), 159014 states have internal predecessors, (427246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159015 states to 159015 states and 427246 transitions. [2021-07-13 18:33:13,370 INFO L78 Accepts]: Start accepts. Automaton has 159015 states and 427246 transitions. Word has length 444 [2021-07-13 18:33:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:33:13,370 INFO L482 AbstractCegarLoop]: Abstraction has 159015 states and 427246 transitions. [2021-07-13 18:33:13,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 159015 states and 427246 transitions. [2021-07-13 18:33:13,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:33:13,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:33:13,705 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:33:13,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 18:33:13,924 INFO L430 AbstractCegarLoop]: === Iteration 120 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:33:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:33:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1658730800, now seen corresponding path program 37 times [2021-07-13 18:33:13,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:33:13,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140527588] [2021-07-13 18:33:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:33:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:14,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:14,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:33:14,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140527588] [2021-07-13 18:33:14,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140527588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:14,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418911138] [2021-07-13 18:33:14,530 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 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 [2021-07-13 18:33:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:14,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:33:14,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:33:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:15,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418911138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:15,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:33:15,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:33:15,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268761326] [2021-07-13 18:33:15,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:33:15,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:33:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:33:15,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:33:15,059 INFO L87 Difference]: Start difference. First operand 159015 states and 427246 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:33:16,684 INFO L93 Difference]: Finished difference Result 198935 states and 529553 transitions. [2021-07-13 18:33:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 18:33:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:33:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:33:17,234 INFO L225 Difference]: With dead ends: 198935 [2021-07-13 18:33:17,234 INFO L226 Difference]: Without dead ends: 198935 [2021-07-13 18:33:17,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 343.3ms TimeCoverageRelationStatistics Valid=598, Invalid=1658, Unknown=0, NotChecked=0, Total=2256 [2021-07-13 18:33:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198935 states. [2021-07-13 18:33:21,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198935 to 157195. [2021-07-13 18:33:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157195 states, 157193 states have (on average 2.6866654367560896) internal successors, (422325), 157194 states have internal predecessors, (422325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157195 states to 157195 states and 422325 transitions. [2021-07-13 18:33:22,278 INFO L78 Accepts]: Start accepts. Automaton has 157195 states and 422325 transitions. Word has length 444 [2021-07-13 18:33:22,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:33:22,278 INFO L482 AbstractCegarLoop]: Abstraction has 157195 states and 422325 transitions. [2021-07-13 18:33:22,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 157195 states and 422325 transitions. [2021-07-13 18:33:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:33:22,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:33:22,581 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:33:22,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:33:22,800 INFO L430 AbstractCegarLoop]: === Iteration 121 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:33:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:33:22,800 INFO L82 PathProgramCache]: Analyzing trace with hash 136461908, now seen corresponding path program 38 times [2021-07-13 18:33:22,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:33:22,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826265358] [2021-07-13 18:33:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:33:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:23,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:33:23,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826265358] [2021-07-13 18:33:23,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826265358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:23,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383180493] [2021-07-13 18:33:23,006 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 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 [2021-07-13 18:33:23,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 18:33:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:33:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:33:23,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:33:23,490 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:33:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:23,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383180493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:23,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:33:23,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:33:23,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119572595] [2021-07-13 18:33:23,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:33:23,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:33:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:33:23,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:33:23,842 INFO L87 Difference]: Start difference. First operand 157195 states and 422325 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:33:25,107 INFO L93 Difference]: Finished difference Result 194530 states and 517760 transitions. [2021-07-13 18:33:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:33:25,107 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:33:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:33:25,993 INFO L225 Difference]: With dead ends: 194530 [2021-07-13 18:33:25,993 INFO L226 Difference]: Without dead ends: 194530 [2021-07-13 18:33:25,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 346.5ms TimeCoverageRelationStatistics Valid=586, Invalid=1576, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 18:33:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194530 states. [2021-07-13 18:33:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194530 to 159015. [2021-07-13 18:33:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159015 states, 159013 states have (on average 2.6868620804588303) internal successors, (427246), 159014 states have internal predecessors, (427246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159015 states to 159015 states and 427246 transitions. [2021-07-13 18:33:30,512 INFO L78 Accepts]: Start accepts. Automaton has 159015 states and 427246 transitions. Word has length 444 [2021-07-13 18:33:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:33:30,513 INFO L482 AbstractCegarLoop]: Abstraction has 159015 states and 427246 transitions. [2021-07-13 18:33:30,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 159015 states and 427246 transitions. [2021-07-13 18:33:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:33:30,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:33:30,795 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:33:31,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:33:31,012 INFO L430 AbstractCegarLoop]: === Iteration 122 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:33:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:33:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash 284129360, now seen corresponding path program 39 times [2021-07-13 18:33:31,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:33:31,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334764765] [2021-07-13 18:33:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:33:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:33:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334764765] [2021-07-13 18:33:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334764765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595035941] [2021-07-13 18:33:31,629 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 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 [2021-07-13 18:33:32,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-13 18:33:32,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:33:32,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:33:32,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:33:32,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:32,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595035941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:32,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:33:32,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:33:32,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664891125] [2021-07-13 18:33:32,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:33:32,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:33:32,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:33:32,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:33:32,673 INFO L87 Difference]: Start difference. First operand 159015 states and 427246 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:33:33,971 INFO L93 Difference]: Finished difference Result 190075 states and 506227 transitions. [2021-07-13 18:33:33,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-13 18:33:33,971 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:33:33,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:33:34,411 INFO L225 Difference]: With dead ends: 190075 [2021-07-13 18:33:34,412 INFO L226 Difference]: Without dead ends: 190075 [2021-07-13 18:33:34,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=574, Invalid=1496, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:33:34,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190075 states. [2021-07-13 18:33:37,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190075 to 157935. [2021-07-13 18:33:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157935 states, 157933 states have (on average 2.6865316305015416) internal successors, (424292), 157934 states have internal predecessors, (424292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157935 states to 157935 states and 424292 transitions. [2021-07-13 18:33:38,493 INFO L78 Accepts]: Start accepts. Automaton has 157935 states and 424292 transitions. Word has length 444 [2021-07-13 18:33:38,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:33:38,493 INFO L482 AbstractCegarLoop]: Abstraction has 157935 states and 424292 transitions. [2021-07-13 18:33:38,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:38,494 INFO L276 IsEmpty]: Start isEmpty. Operand 157935 states and 424292 transitions. [2021-07-13 18:33:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:33:39,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:33:39,186 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:33:39,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2021-07-13 18:33:39,401 INFO L430 AbstractCegarLoop]: === Iteration 123 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:33:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:33:39,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1362420524, now seen corresponding path program 40 times [2021-07-13 18:33:39,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:33:39,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408265619] [2021-07-13 18:33:39,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:33:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:39,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:33:39,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408265619] [2021-07-13 18:33:39,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408265619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:39,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859596717] [2021-07-13 18:33:39,589 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 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 [2021-07-13 18:33:40,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:33:40,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:33:40,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:33:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:33:40,621 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:33:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:40,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859596717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:40,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:33:40,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:33:40,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301864058] [2021-07-13 18:33:40,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:33:40,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:33:40,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:33:40,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:33:40,848 INFO L87 Difference]: Start difference. First operand 157935 states and 424292 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:33:42,080 INFO L93 Difference]: Finished difference Result 187770 states and 499408 transitions. [2021-07-13 18:33:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-13 18:33:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:33:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:33:42,510 INFO L225 Difference]: With dead ends: 187770 [2021-07-13 18:33:42,511 INFO L226 Difference]: Without dead ends: 187770 [2021-07-13 18:33:42,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 315.6ms TimeCoverageRelationStatistics Valid=562, Invalid=1418, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 18:33:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187770 states. [2021-07-13 18:33:45,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187770 to 156855. [2021-07-13 18:33:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156855 states, 156853 states have (on average 2.686196629965637) internal successors, (421338), 156854 states have internal predecessors, (421338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:47,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156855 states to 156855 states and 421338 transitions. [2021-07-13 18:33:47,471 INFO L78 Accepts]: Start accepts. Automaton has 156855 states and 421338 transitions. Word has length 444 [2021-07-13 18:33:47,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:33:47,472 INFO L482 AbstractCegarLoop]: Abstraction has 156855 states and 421338 transitions. [2021-07-13 18:33:47,472 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:47,472 INFO L276 IsEmpty]: Start isEmpty. Operand 156855 states and 421338 transitions. [2021-07-13 18:33:47,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:33:47,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:33:47,753 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:33:47,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-07-13 18:33:47,972 INFO L430 AbstractCegarLoop]: === Iteration 124 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:33:47,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:33:47,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1681520176, now seen corresponding path program 41 times [2021-07-13 18:33:47,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:33:47,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52786518] [2021-07-13 18:33:47,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:33:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:48,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:48,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:33:48,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52786518] [2021-07-13 18:33:48,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52786518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:48,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534113560] [2021-07-13 18:33:48,160 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 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 [2021-07-13 18:33:48,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-13 18:33:48,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:33:48,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:33:48,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:33:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:49,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534113560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:49,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:33:49,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-07-13 18:33:49,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504843192] [2021-07-13 18:33:49,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:33:49,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:33:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:33:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:33:49,319 INFO L87 Difference]: Start difference. First operand 156855 states and 421338 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:33:50,424 INFO L93 Difference]: Finished difference Result 180580 states and 481042 transitions. [2021-07-13 18:33:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 18:33:50,425 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:33:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:33:51,344 INFO L225 Difference]: With dead ends: 180580 [2021-07-13 18:33:51,344 INFO L226 Difference]: Without dead ends: 180580 [2021-07-13 18:33:51,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 18:33:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180580 states. [2021-07-13 18:33:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180580 to 156855. [2021-07-13 18:33:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156855 states, 156853 states have (on average 2.686196629965637) internal successors, (421338), 156854 states have internal predecessors, (421338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:55,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156855 states to 156855 states and 421338 transitions. [2021-07-13 18:33:55,942 INFO L78 Accepts]: Start accepts. Automaton has 156855 states and 421338 transitions. Word has length 444 [2021-07-13 18:33:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:33:55,943 INFO L482 AbstractCegarLoop]: Abstraction has 156855 states and 421338 transitions. [2021-07-13 18:33:55,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 156855 states and 421338 transitions. [2021-07-13 18:33:56,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2021-07-13 18:33:56,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:33:56,250 INFO L508 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:33:56,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:33:56,470 INFO L430 AbstractCegarLoop]: === Iteration 125 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:33:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:33:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -222356652, now seen corresponding path program 42 times [2021-07-13 18:33:56,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:33:56,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460624268] [2021-07-13 18:33:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:33:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:33:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1713 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-07-13 18:33:56,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:33:56,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460624268] [2021-07-13 18:33:56,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460624268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:56,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598580015] [2021-07-13 18:33:56,673 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 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 [2021-07-13 18:33:57,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-13 18:33:57,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:33:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-13 18:33:57,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:33:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 30 proven. 1690 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-07-13 18:33:58,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598580015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:33:58,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:33:58,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 24 [2021-07-13 18:33:58,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838151983] [2021-07-13 18:33:58,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-13 18:33:58,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:33:58,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-13 18:33:58,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2021-07-13 18:33:58,154 INFO L87 Difference]: Start difference. First operand 156855 states and 421338 transitions. Second operand has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:33:58,692 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-07-13 18:33:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:33:59,276 INFO L93 Difference]: Finished difference Result 173180 states and 462261 transitions. [2021-07-13 18:33:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 18:33:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 444 [2021-07-13 18:33:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:34:00,121 INFO L225 Difference]: With dead ends: 173180 [2021-07-13 18:34:00,122 INFO L226 Difference]: Without dead ends: 173180 [2021-07-13 18:34:00,122 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 442.7ms TimeCoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-07-13 18:34:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173180 states. [2021-07-13 18:34:03,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173180 to 152535. [2021-07-13 18:34:03,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152535 states, 152533 states have (on average 2.6848091888312693) internal successors, (409522), 152534 states have internal predecessors, (409522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152535 states to 152535 states and 409522 transitions. [2021-07-13 18:34:03,999 INFO L78 Accepts]: Start accepts. Automaton has 152535 states and 409522 transitions. Word has length 444 [2021-07-13 18:34:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:34:04,000 INFO L482 AbstractCegarLoop]: Abstraction has 152535 states and 409522 transitions. [2021-07-13 18:34:04,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 19.166666666666668) internal successors, (460), 24 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 152535 states and 409522 transitions. [2021-07-13 18:34:04,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-07-13 18:34:04,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:34:04,747 INFO L508 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:34:04,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 18:34:04,961 INFO L430 AbstractCegarLoop]: === Iteration 126 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:34:04,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:34:04,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1907019601, now seen corresponding path program 12 times [2021-07-13 18:34:04,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:34:04,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098126186] [2021-07-13 18:34:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:34:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:34:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 36 proven. 2490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:34:05,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:34:05,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098126186] [2021-07-13 18:34:05,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098126186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:05,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540902134] [2021-07-13 18:34:05,219 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 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 [2021-07-13 18:34:05,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-13 18:34:05,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:34:05,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:34:05,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:34:06,303 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:34:06,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2526 backedges. 36 proven. 2490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 18:34:06,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540902134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:06,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:34:06,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 29 [2021-07-13 18:34:06,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741655128] [2021-07-13 18:34:06,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-13 18:34:06,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:34:06,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-13 18:34:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2021-07-13 18:34:06,400 INFO L87 Difference]: Start difference. First operand 152535 states and 409522 transitions. Second operand has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:07,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:34:07,712 INFO L93 Difference]: Finished difference Result 167942 states and 449033 transitions. [2021-07-13 18:34:07,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 18:34:07,712 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 474 [2021-07-13 18:34:07,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:34:08,165 INFO L225 Difference]: With dead ends: 167942 [2021-07-13 18:34:08,165 INFO L226 Difference]: Without dead ends: 167942 [2021-07-13 18:34:08,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=875, Invalid=1881, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 18:34:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167942 states. [2021-07-13 18:34:11,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167942 to 159090. [2021-07-13 18:34:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159090 states, 159088 states have (on average 2.684627376043448) internal successors, (427092), 159089 states have internal predecessors, (427092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:12,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159090 states to 159090 states and 427092 transitions. [2021-07-13 18:34:12,380 INFO L78 Accepts]: Start accepts. Automaton has 159090 states and 427092 transitions. Word has length 474 [2021-07-13 18:34:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:34:12,380 INFO L482 AbstractCegarLoop]: Abstraction has 159090 states and 427092 transitions. [2021-07-13 18:34:12,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 17.96551724137931) internal successors, (521), 29 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 159090 states and 427092 transitions. [2021-07-13 18:34:13,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-07-13 18:34:13,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:34:13,524 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:34:13,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:34:13,741 INFO L430 AbstractCegarLoop]: === Iteration 127 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:34:13,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:34:13,741 INFO L82 PathProgramCache]: Analyzing trace with hash 698773911, now seen corresponding path program 69 times [2021-07-13 18:34:13,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:34:13,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404096890] [2021-07-13 18:34:13,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:34:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:34:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 24 proven. 1178 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-07-13 18:34:13,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:34:13,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404096890] [2021-07-13 18:34:13,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404096890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:13,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876332027] [2021-07-13 18:34:13,885 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 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 [2021-07-13 18:34:14,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-13 18:34:14,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:34:14,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:34:14,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:34:14,845 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:34:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1319 backedges. 24 proven. 1155 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-07-13 18:34:14,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876332027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:14,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:34:14,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2021-07-13 18:34:14,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959041174] [2021-07-13 18:34:14,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 18:34:14,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:34:14,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 18:34:14,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-07-13 18:34:14,899 INFO L87 Difference]: Start difference. First operand 159090 states and 427092 transitions. Second operand has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:16,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:34:16,616 INFO L93 Difference]: Finished difference Result 277120 states and 738750 transitions. [2021-07-13 18:34:16,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 18:34:16,616 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 476 [2021-07-13 18:34:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:34:17,806 INFO L225 Difference]: With dead ends: 277120 [2021-07-13 18:34:17,806 INFO L226 Difference]: Without dead ends: 277120 [2021-07-13 18:34:17,806 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=278, Invalid=912, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 18:34:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277120 states. [2021-07-13 18:34:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277120 to 193710. [2021-07-13 18:34:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193710 states, 193708 states have (on average 2.6894759121977407) internal successors, (520973), 193709 states have internal predecessors, (520973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:24,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193710 states to 193710 states and 520973 transitions. [2021-07-13 18:34:24,331 INFO L78 Accepts]: Start accepts. Automaton has 193710 states and 520973 transitions. Word has length 476 [2021-07-13 18:34:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:34:24,332 INFO L482 AbstractCegarLoop]: Abstraction has 193710 states and 520973 transitions. [2021-07-13 18:34:24,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 22.764705882352942) internal successors, (387), 17 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 193710 states and 520973 transitions. [2021-07-13 18:34:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-07-13 18:34:25,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:34:25,186 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:34:25,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-07-13 18:34:25,401 INFO L430 AbstractCegarLoop]: === Iteration 128 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:34:25,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:34:25,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1005353038, now seen corresponding path program 70 times [2021-07-13 18:34:25,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:34:25,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391331493] [2021-07-13 18:34:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:34:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:34:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:34:25,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:34:25,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391331493] [2021-07-13 18:34:25,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391331493] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:25,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308634555] [2021-07-13 18:34:25,580 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 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 [2021-07-13 18:34:26,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 18:34:26,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:34:26,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:34:26,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:34:26,426 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-07-13 18:34:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:34:26,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308634555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:26,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:34:26,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:34:26,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791670874] [2021-07-13 18:34:26,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:34:26,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:34:26,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:34:26,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:34:26,654 INFO L87 Difference]: Start difference. First operand 193710 states and 520973 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:34:28,111 INFO L93 Difference]: Finished difference Result 252720 states and 674678 transitions. [2021-07-13 18:34:28,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 18:34:28,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-07-13 18:34:28,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:34:29,145 INFO L225 Difference]: With dead ends: 252720 [2021-07-13 18:34:29,145 INFO L226 Difference]: Without dead ends: 252720 [2021-07-13 18:34:29,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 241.0ms TimeCoverageRelationStatistics Valid=360, Invalid=1200, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 18:34:29,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252720 states. [2021-07-13 18:34:33,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252720 to 190550. [2021-07-13 18:34:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190550 states, 190548 states have (on average 2.689269895249491) internal successors, (512435), 190549 states have internal predecessors, (512435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190550 states to 190550 states and 512435 transitions. [2021-07-13 18:34:35,697 INFO L78 Accepts]: Start accepts. Automaton has 190550 states and 512435 transitions. Word has length 477 [2021-07-13 18:34:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:34:35,697 INFO L482 AbstractCegarLoop]: Abstraction has 190550 states and 512435 transitions. [2021-07-13 18:34:35,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:35,698 INFO L276 IsEmpty]: Start isEmpty. Operand 190550 states and 512435 transitions. [2021-07-13 18:34:36,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-07-13 18:34:36,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:34:36,072 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:34:36,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:34:36,293 INFO L430 AbstractCegarLoop]: === Iteration 129 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:34:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:34:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 64760262, now seen corresponding path program 71 times [2021-07-13 18:34:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:34:36,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398655496] [2021-07-13 18:34:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:34:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:34:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:34:36,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:34:36,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398655496] [2021-07-13 18:34:36,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398655496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:36,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559731477] [2021-07-13 18:34:36,741 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 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 [2021-07-13 18:34:37,130 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-13 18:34:37,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:34:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:34:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:34:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:34:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559731477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:37,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:34:37,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:34:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803059583] [2021-07-13 18:34:37,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:34:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:34:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:34:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:34:37,620 INFO L87 Difference]: Start difference. First operand 190550 states and 512435 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:39,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:34:39,408 INFO L93 Difference]: Finished difference Result 286290 states and 766535 transitions. [2021-07-13 18:34:39,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:34:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-07-13 18:34:39,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:34:40,679 INFO L225 Difference]: With dead ends: 286290 [2021-07-13 18:34:40,679 INFO L226 Difference]: Without dead ends: 286290 [2021-07-13 18:34:40,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=345, Invalid=1137, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:34:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286290 states. [2021-07-13 18:34:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286290 to 193450. [2021-07-13 18:34:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193450 states, 193448 states have (on average 2.68966337206898) internal successors, (520310), 193449 states have internal predecessors, (520310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:47,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193450 states to 193450 states and 520310 transitions. [2021-07-13 18:34:47,653 INFO L78 Accepts]: Start accepts. Automaton has 193450 states and 520310 transitions. Word has length 477 [2021-07-13 18:34:47,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:34:47,654 INFO L482 AbstractCegarLoop]: Abstraction has 193450 states and 520310 transitions. [2021-07-13 18:34:47,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:47,654 INFO L276 IsEmpty]: Start isEmpty. Operand 193450 states and 520310 transitions. [2021-07-13 18:34:48,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-07-13 18:34:48,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:34:48,055 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:34:48,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 18:34:48,273 INFO L430 AbstractCegarLoop]: === Iteration 130 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:34:48,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:34:48,273 INFO L82 PathProgramCache]: Analyzing trace with hash 2100751524, now seen corresponding path program 72 times [2021-07-13 18:34:48,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:34:48,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968863807] [2021-07-13 18:34:48,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:34:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:34:48,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:34:48,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:34:48,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968863807] [2021-07-13 18:34:48,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968863807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:48,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532996782] [2021-07-13 18:34:48,749 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 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 [2021-07-13 18:34:49,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-13 18:34:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 18:34:49,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:34:49,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:34:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:34:49,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532996782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:49,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:34:49,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:34:49,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614469] [2021-07-13 18:34:49,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:34:49,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:34:49,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:34:49,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:34:49,683 INFO L87 Difference]: Start difference. First operand 193450 states and 520310 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:51,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:34:51,461 INFO L93 Difference]: Finished difference Result 270730 states and 724052 transitions. [2021-07-13 18:34:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:34:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-07-13 18:34:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:34:52,295 INFO L225 Difference]: With dead ends: 270730 [2021-07-13 18:34:52,295 INFO L226 Difference]: Without dead ends: 270730 [2021-07-13 18:34:52,295 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=347, Invalid=1135, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:34:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270730 states. [2021-07-13 18:34:57,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270730 to 196690. [2021-07-13 18:34:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196690 states, 196688 states have (on average 2.6904132433092003) internal successors, (529172), 196689 states have internal predecessors, (529172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196690 states to 196690 states and 529172 transitions. [2021-07-13 18:34:59,110 INFO L78 Accepts]: Start accepts. Automaton has 196690 states and 529172 transitions. Word has length 477 [2021-07-13 18:34:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 18:34:59,111 INFO L482 AbstractCegarLoop]: Abstraction has 196690 states and 529172 transitions. [2021-07-13 18:34:59,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:34:59,111 INFO L276 IsEmpty]: Start isEmpty. Operand 196690 states and 529172 transitions. [2021-07-13 18:34:59,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-07-13 18:34:59,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 18:34:59,511 INFO L508 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 18:34:59,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 18:34:59,725 INFO L430 AbstractCegarLoop]: === Iteration 131 === [t1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-07-13 18:34:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 18:34:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash 975472646, now seen corresponding path program 73 times [2021-07-13 18:34:59,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 18:34:59,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158600245] [2021-07-13 18:34:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 18:34:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:34:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:34:59,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 18:34:59,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158600245] [2021-07-13 18:34:59,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158600245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:34:59,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992478577] [2021-07-13 18:34:59,906 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 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 [2021-07-13 18:35:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 18:35:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 26 conjunts are in the unsatisfiable core [2021-07-13 18:35:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 18:35:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 27 proven. 1386 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-07-13 18:35:00,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992478577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 18:35:00,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 18:35:00,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-07-13 18:35:00,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705023388] [2021-07-13 18:35:00,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 18:35:00,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 18:35:00,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 18:35:00,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-07-13 18:35:00,823 INFO L87 Difference]: Start difference. First operand 196690 states and 529172 transitions. Second operand has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 18:35:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 18:35:02,654 INFO L93 Difference]: Finished difference Result 251030 states and 669861 transitions. [2021-07-13 18:35:02,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 18:35:02,655 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 21.15) internal successors, (423), 20 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2021-07-13 18:35:02,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 18:35:03,642 INFO L225 Difference]: With dead ends: 251030 [2021-07-13 18:35:03,642 INFO L226 Difference]: Without dead ends: 251030 [2021-07-13 18:35:03,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 18:35:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251030 states. Received shutdown request... [2021-07-13 18:35:05,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 18:35:05,842 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:35:05,843 INFO L301 ceAbstractionStarter]: Result for error location t1Thread1of1ForFork1 was TIMEOUT (1/3) [2021-07-13 18:35:05,844 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-07-13 18:35:05,845 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:35:05,845 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:35:05,845 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:35:05,845 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:35:05,845 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:35:05,845 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:35:05,845 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:35:05,845 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 18:35:05,846 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-13 18:35:05,847 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:35:05,847 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was TIMEOUT (2/3) [2021-07-13 18:35:05,847 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-13 18:35:05,850 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 18:35:05,851 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 18:35:05,851 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 18:35:05,851 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 18:35:05,851 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 18:35:05,851 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 18:35:05,851 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 18:35:05,851 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == t2Thread1of1ForFork0======== [2021-07-13 18:35:05,854 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 152 places, 157 transitions, 336 flow [2021-07-13 18:35:05,855 WARN L547 AbstractCegarLoop]: Verification canceled [2021-07-13 18:35:05,855 INFO L301 ceAbstractionStarter]: Result for error location t2Thread1of1ForFork0 was TIMEOUT (3/3) [2021-07-13 18:35:05,855 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 18:35:05,856 WARN L196 ceAbstractionStarter]: Timeout [2021-07-13 18:35:05,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 06:35:05 BasicIcfg [2021-07-13 18:35:05,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 18:35:05,857 INFO L168 Benchmark]: Toolchain (without parser) took 760377.87 ms. Allocated memory was 227.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 188.9 MB in the beginning and 6.7 GB in the end (delta: -6.5 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-13 18:35:05,857 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 227.5 MB. Free memory is still 207.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 18:35:05,857 INFO L168 Benchmark]: CACSL2BoogieTranslator took 442.06 ms. Allocated memory is still 227.5 MB. Free memory was 188.7 MB in the beginning and 192.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. [2021-07-13 18:35:05,857 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.50 ms. Allocated memory is still 227.5 MB. Free memory was 192.3 MB in the beginning and 189.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:35:05,857 INFO L168 Benchmark]: Boogie Preprocessor took 16.78 ms. Allocated memory is still 227.5 MB. Free memory was 189.5 MB in the beginning and 188.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-07-13 18:35:05,858 INFO L168 Benchmark]: RCFGBuilder took 359.71 ms. Allocated memory is still 227.5 MB. Free memory was 187.8 MB in the beginning and 203.2 MB in the end (delta: -15.4 MB). Peak memory consumption was 32.9 MB. Max. memory is 8.0 GB. [2021-07-13 18:35:05,858 INFO L168 Benchmark]: TraceAbstraction took 759506.15 ms. Allocated memory was 227.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 202.2 MB in the beginning and 6.7 GB in the end (delta: -6.5 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-07-13 18:35:05,859 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 227.5 MB. Free memory is still 207.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 442.06 ms. Allocated memory is still 227.5 MB. Free memory was 188.7 MB in the beginning and 192.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 6.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 33.50 ms. Allocated memory is still 227.5 MB. Free memory was 192.3 MB in the beginning and 189.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.78 ms. Allocated memory is still 227.5 MB. Free memory was 189.5 MB in the beginning and 188.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 359.71 ms. Allocated memory is still 227.5 MB. Free memory was 187.8 MB in the beginning and 203.2 MB in the end (delta: -15.4 MB). Peak memory consumption was 32.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 759506.15 ms. Allocated memory was 227.5 MB in the beginning and 8.0 GB in the end (delta: 7.8 GB). Free memory was 202.2 MB in the beginning and 6.7 GB in the end (delta: -6.5 GB). 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: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 941]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while BasicCegarLoop was constructing initial abstraction,while PetriNet2FiniteAutomaton was constructing automaton for Petri net that has has 152 places, 157 transitions, 336 flow. Already constructed 2 states. Currently 1 states in worklist.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t1Thread1of1ForFork1 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 759368.3ms, OverallIterations: 131, TraceHistogramMax: 13, EmptinessCheckTime: 38568.2ms, AutomataDifference: 173075.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 290.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 20256 SDtfs, 187732 SDslu, 180406 SDs, 0 SdLazy, 16374 SolverSat, 2888 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9189.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53199 GetRequests, 48872 SyntacticMatches, 2 SemanticMatches, 4325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32224 ImplicationChecksByTransitivity, 32593.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=196690occurred in iteration=130, InterpolantAutomatonStates: 3389, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 381098.5ms AutomataMinimizationTime, 131 MinimizatonAttempts, 4149107 StatesRemovedByMinimization, 130 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 7208.2ms SsaConstructionTime, 32850.7ms SatisfiabilityAnalysisTime, 90218.3ms InterpolantComputationTime, 97009 NumberOfCodeBlocks, 96831 NumberOfCodeBlocksAsserted, 788 NumberOfCheckSat, 96751 ConstructedInterpolants, 0 QuantifiedInterpolants, 281522 SizeOfPredicates, 2334 NumberOfNonLiveVariables, 93046 ConjunctsInSsa, 2602 ConjunctsInUnsatCore, 258 InterpolantComputations, 5 PerfectInterpolantSequences, 19693/281462 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 2.2ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: t2Thread1of1ForFork0 with 1 thread instances CFG has 5 procedures, 244 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 6.3ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown